Angular 5 not showing user entered values from formarray

In angular 5 I am trying to add new row and remove row functionality. For add new row and delete row I have taken code from here. Everything is working fine but when I am trying to get the user entered value in the new row fields I am not getting those values. I am getting the value for Event Name. But for other 3 fields like Package Name, Package Price, Max Purchase Limit, I am not getting them. Here is the code what I have tried.

my event-create.component.html looks like this

<div class="container col-md-12">
  <h1 class="page-header">Create Event</h1>
  <div class="row show-hide-message">
    <div [ngClass]= "messageClass">{{message}}</div>
  </div>
  <form [formGroup] = "form" (ngSubmit)="onEventSubmit()">
  <fieldset>
    <div class="form-group">
      <label for="eventname">Event Name</label>
      <div class='form-group' [ngClass]="{'has-error': form.controls.eventname.errors && form.controls.eventname.dirty, 
  'has-success': !form.controls.eventname.errors
}">
        <input type="text" class="form-control" autocomplete="off" placeholder="Event Name" formControlName="eventname">
        <ul class="help-block">
          <li *ngIf="(form.controls.eventname.errors?.minlength ) && form.controls.eventname.dirty">Event name should be atleast 5 characters</li>
        </ul>
      </div>
    </div>


    <h4>Package Price</h4>
    <hr>
    <div class="row" formArrayName="sections">
      <div class="col-md-12" *ngFor="let section of getSections(form); let i = index">
        <div class="form-group col-md-5">
          <label for="packagename">Package Name</label>
          <input type="text" class="form-control" autocomplete="off" placeholder="Package Name" formControlName="packagename" >
       </div>
        <div class="form-group col-md-2">
          <label for="packageprice">Package Price</label>
          <input type="number" class="form-control" autocomplete="off" placeholder="Package Price" formControlName="packageprice" >
        </div>
        <div class="form-group col-md-2">
          <label for="packagelimit">Max Purchase Limit</label>
          <input type="number" class="form-control" formControlName="packagelimit" autocomplete="off" >
        </div>
        <div class="form-group col-md-1">
          <br/>
          <input type="button" (click)="addPackageRow()" class="btn btn-md btn-success" value="+" name="">
        </div>
        <div class="form-group col-md-1" *ngIf="getSections(form).length > 1">
          <br/>
          <input type="button" (click)="removeSection(i)" class="btn btn-md btn-error" value="-" name="">
        </div>
      </div>
    </div>

    <input [disabled]=!form.valid type="submit" class="btn btn-primary" value="Submit">

    <pre>{{form.value | json}}</pre>

  </fieldset>
</form>
</div>

and my event-create.component.ts looks like this

import { Component, OnInit } from '@angular/core';
import { FormArray, FormBuilder, FormControl, FormGroup, Validators } from '@angular/forms';
import { FormControlName } from '@angular/forms/src/directives/reactive_directives/form_control_name';


@Component({
  selector: 'app-event-create',
  templateUrl: './event-create.component.html',
  styleUrls: ['./event-create.component.css']
})
export class EventCreateComponent implements OnInit {

  form :  FormGroup;
  packagesArray: FormArray;


  constructor(
    private formBuilder : FormBuilder,
    ) { this.createEventForm() }

  createEventForm() {
    this.form = this.formBuilder.group({
      eventname: ['', Validators.compose([
        Validators.required,
        Validators.minLength(5)
      ])],
      packages: this.packagesArray
    })
  }

  ngOnInit() {
    this.form = new FormGroup({
      eventname: new FormControl(''),
      sections: new FormArray([
        this.initSection(),
      ]),
    });
  }

  initSection() {
    return new FormGroup({
      packagename: new FormControl(''),
      packageprice: new FormControl(''),
      packagelimit: new FormControl('')
    });
  }

  initItemRows() {
        return this.formBuilder.group({
            itemname: ['']
        });
    }

  onEventSubmit() {}

  public addPackageRow() {
    const control = <FormArray>this.form.get('sections');
    control.push(this.initSection());
  }

  initOptions() {
    return new FormGroup({
      optionTitle: new FormControl('')
    });
  }

  addSection() {
    const control = <FormArray>this.form.get('sections');
    control.push(this.initSection());
  }

  getSections(form) {
    return form.controls.sections.controls;
  }

  public removeSection(i){
   const control = <FormArray>this.form.get('sections');
   control.removeAt(i);
  }

}

Its not showing user entered value in html page also not doing any validation for the eventname field.

Here is the demo what I have done so far

https://stackblitz.com/edit/angular-3s5wwf

Can someone tell me what is going wrong here. Any suggestion or advice will be really appreciable. Thanks.