Using WhatsApp's Business Cloud API, how can I send a reminder message with a calendar event that my customers can easily add to their device calendar? I didn't find any way to do it.

I am using the Whatsapp Business API and I am testing my app using their test format, which gives you a test number and you can add your personal phone number to receive the test template. I am correctly receiving the test template from Meta to my phone number, however when I actually test my app, by me sending a message to that test number, this error shows up:

response: { status: 400, statusText: 'Bad Request', headers: Object [AxiosHeaders] { vary: 'Origin, Accept-Encoding', 'x-business-use-case-usage': '{"199147949938479":[{"type":"whatsapp","call_count":1,"total_cputime":1,"total_time":1,"estimated_time_to_regain_access":0}]}', 'content-type': 'application/json', 'www-authenticate': 'OAuth "Facebook Platform" "invalid_request" "(#131030) Recipient phone number not in allowed list"',

My phone number is definitely in the allowed list as I am receiving their test template with no problems. Maybe there is a problem with my area code? I am from Argentina and my area code is +54. It also has a 9 before the actual phone number. I tried with and without the 9 and in all possible format. No results. Any clues what may be?

I'm trying to get notified about my contacts' status(picture & video) changes on whatsapp using whatsmeow go library. The library doesn't specifically mention this feature on the documentations. Does anyone know if this feature is supported or if there is a work around for it? Also does this comply with whatsapp terms of services or no?

I tried to check whatsapp web client and their business api but I could not find a clue.

I am building a website in which i want that when a user places an order, store owner should receive the order details in his whatsapp. Like First and last name, address, email, mobile and products which he purchased. Currently i tried Twilio for this purpose, but i don't want to use any 3rd party for this. I want to use only CORE PHP and whatsapp business api or library to achieve this.

Here is what i have done so far.

`<?php require 'vendor/autoload.php'; use Twilio\Rest\Client; $accountSid = '0000-0000-0000-0000-00000'; $authToken  = '0000-0000-00000-00000-00000'; $twilioNumber = 'whatsapp:+12000000000';  $whatsappNumber = 'whatsapp:+1255844885454';  $firstName = $_POST['first_name']; $lastName = $_POST['last_name']; $address = $_POST['address']; $townCity = $_POST['town_city']; $mobile = $_POST['mobile']; $totalprice = $_POST['totalprice']; $orderDetails = "First Name: $firstName\nLast Name: $lastName\nAddress: $address\nTown/City: $townCity\nMobile: $mobile\nTotal Amount: Rs$totalprice"; $client = new Client($accountSid, $authToken); try {     $message = $client->messages->create(         $whatsappNumber,         array(             'from' => $twilioNumber,             'body' => $orderDetails         )     );     header("Location: checkout.php");     exit(); } catch (Exception $e) {     echo 'Error: ' . $e->getMessage(); } ` 

when i try to add phone number on cloud whatsapp official API i receive error "this whatsapp business account does not have permission to add phone numbers to the account"

error "this whatsapp business account does not have permission to add phone numbers to the account"