Select dropdown grup no kontak sms api dengan database

Assalamualaikum selamat menunaikan ibadah puasa semoga apapun yang di lakukan dalam kebaikan menjadi pahala. ane mau bertanya ane buat sms api cuman ad masalah di pas memanggil no nya, no nya ane buat per grup cuman no tidak terbaca... ada 2 tabel.. 1 tabel untuk nama grup dan yg ke 2 tabel kontak..... sms.php

<form action="kirim.php" method="post">
 <div class="form-group" >
        <label >Pilih Grup</label>
        <select class="form-control"  name="nohp" required autofocus>
          <option>Kirim Ke Semua</option>

          <?php
          include'koneksi.php';
          $sql = 'SELECT id_grup,nama_grup,id,grup_kontak FROM grup left join contact on id_grup=id ';
            $result = mysqli_query($koneksi, $sql);
             while($row = mysqli_fetch_assoc($result)) {

          ?>
           <option  value='<?php echo $row['telpon']; ?>'><?php echo $row['nama_grup']; }?></option>
        </select>
      </div>

      <div class="form-group">
        <label for="exampleInputPassword4">Tulis Pesan</label>
        <textarea class="form-control" rows="10" type="text" name="pesan"  placeholder="Ketikan Pesan " required ></textarea>
      </div>
      <div class="form-group">
        <div class="input-group col-md-12">
          <button  type="submit" class="btn btn-primary" >Kirim Pesan</button>
        </div>
      </div>
    </form>

kirim.php

<pre lang="php"><?php

$telepon=$_POST['nohp'];
$message=$_POST['pesan'];
// Script Kirim SMS Api Zenziva
$userkey = "ur7fei"; //userkey lihat di zenziva
$passkey = "n5eugk9uxa"; // set passkey di zenziva

$url = "https://reguler.zenziva.net/apps/smsapi.php";
$curlHandle = curl_init();
curl_setopt($curlHandle, CURLOPT_URL, $url);
curl_setopt($curlHandle, CURLOPT_POSTFIELDS, 'userkey='.$userkey.'&passkey='.$passkey.'&nohp='.$telepon.'&pesan='.urlencode($message));
curl_setopt($curlHandle, CURLOPT_HEADER, 0);
curl_setopt($curlHandle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curlHandle, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($curlHandle, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curlHandle, CURLOPT_TIMEOUT,30);
curl_setopt($curlHandle, CURLOPT_POST, 1);
$results = curl_exec($curlHandle);
curl_close($curlHandle);

$XMLdata = new SimpleXMLElement($results);
$status = $XMLdata->message[0]->text;
echo $status;

?></pre>