The worst service provider with the worst setup

I’ve been struggling to get through to retentions department for two months , I’ve logged complaint after complaint. They finally got back to me after weeks of failed attempts to reach them . Then a few days ago my bank informs me that I need to forward a settlement letter from MTN , mind you MTN has not sent me any feedback since my complaint. I tried to call for a settlement letter and again I have to hold for the same retention department that never answers . Everything is on hold because MTN is ***********. I’m still waiting for my settlement letter ***