How to do reverse geocoding , the adress is displaying by without zip code or places near

Hello ,
I was trying to retrieve adress using geolocation and geocoder to get all informatons about lke where i am now , municipalities near me, Zip code, …
but the geocoder do not work

my file ts :

import { Component,  ViewChild, NgModule  } from '@angular/core';
import { Camera, CameraOptions } from '@ionic-native/camera';
import { Geolocation } from '@ionic-native/geolocation';
import { FileTransfer, FileUploadOptions, FileTransferObject } from '@ionic-native/file-transfer';
import { Storage } from '@ionic/storage';
import { File } from '@ionic-native/file';
import { NavController, NavParams, ToastController, LoadingController, Platform} from 'ionic-angular';
import { FormBuilder, FormGroup, Validators, NgForm, FormControl,ValidatorFn, AbstractControl } from '@angular/forms';
import { NativeGeocoder, NativeGeocoderReverseResult, NativeGeocoderOptions } from '@ionic-native/native-geocoder';
import { EspaceCitoyenPage } from '../espace-citoyen/espace-citoyen';
import { PostProvider } from '../../providers/post-provider';
import { Http, Headers, RequestOptions }  from '@angular/http';
import 'rxjs/add/operator/catch';


@Component({
  selector:    'page-reclamation-automatique',
  templateUrl: 'reclamation-automatique.html',
})


export class ReclamationAutomatiquePage {

  geoencoderOptions: NativeGeocoderOptions = {
    useLocale: true,
    maxResults: 5
  };

  options: CameraOptions = {
    quality: 100,
    destinationType: this.camera.DestinationType.DATA_URL,
    encodingType: this.camera.EncodingType.JPEG,
    mediaType: this.camera.MediaType.PICTURE,
    cameraDirection:0
  }

  private Form : FormGroup;
  public position: string;
  loading: any;
  myphoto: string= '';

  items: any;
  public dt: any;

  cin: string="";
  type_rec: string ="";

  description: string ="";
  gouvernorat: string ="";
  commune: string="";
  postal: string="";
  adresse: string="";
  laptitude: any;
  longitude: any;
  geoAccuracy: number;
  geoAddress: any;
  watchLocationUpdates: any; 
  isWatching: boolean;

  constructor(public navCtrl: NavController, public storage: Storage, public toastCtrl: ToastController, private nativeGeocoder: NativeGeocoder,
    private postPvdr: PostProvider, public plt: Platform, private geolocation: Geolocation, private platform: Platform,
    private formBuilder: FormBuilder, public loadingCtrl: LoadingController,
    private camera: Camera, private transfer: FileTransfer,
    private file: File, public http: Http) {

      this.Form = formBuilder.group({
        type_rec: ['', Validators.compose([Validators.required])],
        description : ['', Validators.compose([Validators.required])],
        position : ['',]
      });

      this.loading = this.loadingCtrl.create({
        cssClass: 'my-loading-class',
        spinner: 'bubbles',
        duration: 3000
      });

    this.platform.ready().then(() => {

      //set options
      var options = {
        timeout: 20000 // milliseconds
      }
      //use the geolocation 
      this.geolocation.getCurrentPosition(options).then(data => {
        this.laptitude = data.coords.longitude;
        this.longitude = data.coords.latitude;
        this.getGeoencoder(this.laptitude, this.longitude)
      }).catch((err) => {
        console.log("Erreur", err);
      });
    });
  }


    ionViewDidLoad()
    {
      console.log('ionViewDidLoad ReclamationAutomatiquePage');
    }


//geocoder method to fetch address from coordinates passed as arguments
  getGeoencoder(laptitude, longitude) {
    this.nativeGeocoder.reverseGeocode(laptitude, longitude, this.geoencoderOptions)
      .then((result: NativeGeocoderReverseResult[]) => {
        this.geoAddress = this.generateAddress(result[0]);
      })
      .catch((error: any) => {
        alert('Error getting location' + JSON.stringify(error));
      });
  }
    
  //Return Comma saperated address
  generateAddress(addressObj) {
    let obj = [];
    let address = "";
    for (let key in addressObj) {
      obj.push(addressObj[key]);
    }
    obj.reverse();
    for (let val in obj) {
      if (obj[val].length)
        address += obj[val] + ', ';
    }
    return address.slice(0, -2);
  }

my file html:


                  <ion-item>
                        latitude    :  {{ this.laptitude }}
                  </ion-item>

                  <ion-item>
                        Longitude   :  {{ this.longitude }}
                  </ion-item>

                  <ion-item>
                        Adresse : {{ this.geoAdress }}
                  </ion-item>