En Argentina funciona mal la entrega de codigos

Hola! Estamos pagando mucha publicidad en Instagram y muchos clientes se están quejando porque quieren usar el servicio en argentina y nunca les llega el código de activación!

Dear Partner,

Kindly proceed with the following troubleshooting steps:

1. kill and restart the app
2. reinstall the app
3. make a new attempt to get an sms code​

Also, to rule out any device issues, please:
-Power Cycle the device (turn it off and then turn it back on again) to reconnect to Carrier Network-Free up memory by deleting old messages-Make sure the device is in good cell coverage
-Make sure the device is not in roaming status or ported-Check if sms traffic from other apps is delivered
-Alternatively, please swap the SIM to another phone to verify if the delivery issue is phone-related

If all the above is done and you are still failing to get sms code, kindly advise the full phone number with the country code, and I will escalate the issue to our sms gateway provider for further resolution.

I would also appreciate :
date and time an SMS was requested (request should be within last 24-48 hours);
name of the mobile network provider;

Looking forward to your reply.

Regards,
Myka