Disgraceful service

I have upgraded my contract on the 1 August 2024.Since the upgrade I have not been able to receive calls. It's on going for a month. I have made numerous calls almost daily and there is no one competent enough at Mtn to resolve my issue. It's frustrating and the service is of an extremely low standard. Call center agents are dropping my call and those that I spend about an hour with ard unable to resolve the problem. I have gone into a store and that was if no help too. My cell number is *** and I am not contactable on this number but Mtn diligently charges me for the services It now 5September and I can't receive calls nor can I dial into Mtn on their customer care line.