No Roaming on MTN. Appalling service. No feedback from customer service

My roaming has been de- activated even if I have data and airtime available. I have tried contacting in all different ways MTN customer service from abroad through email and absolutely NO reply. There is not even a number I can call from abroad. Absolutely APPALLING SERVICE. I’m now overseas and have been without roaming for almost a week and there is no- reply from customer service . How can this even happen???? I’m disgusted as this is not what a mobile operator service to its customer should be. On the MTN app there is nothing that shows how to re activate roaming. I’m disgusted and will definitely switch to another operator when back. Continue loosing customers dear MTN. You don’t deserve them.