/**
  * This method is called when the user send the campaign to only subscribed customers
  */
 public static function multipleChoiceSubCampaign($info)
 {
     $general_settings = get_option('ws_main_option', array());
     $sender_campaign = $info['from'];
     $sender_campaign_message = $info['text'];
     //Create a campaign
     $camp_name = 'SMS_' . date('Ymd');
     $first_name = '{NAME}';
     $last_name = '{SURNAME}';
     $fname = str_replace('{first_name}', $first_name, $sender_campaign_message);
     $content = str_replace('{last_name}', $last_name, $fname);
     $listid = array_keys(self::$lists);
     $data = array("name" => $camp_name, "sender" => $sender_campaign, "content" => $content, "listid" => $listid, "scheduled_date" => date('Y-m-d H:i:s', current_time('timestamp') + 60));
     if (!class_exists('Mailin')) {
         require_once 'mailin.php';
     }
     $mailin = new Mailin(WC_Sendinblue::sendinblue_api_url, $general_settings['access_key']);
     $result = $mailin->create_sms_campaign($data);
     delete_transient('wswcsbcredit_' . md5($general_settings['access_key']));
     return $result;
 }