Recurring issues

I have had to go into the MTN branch at least 6 times in the last month for my account being suspended. Every time it is because they claim I haven't even aid my account but my account has been paid on time every month. Last month I had to pay over because they say there was an outstanding amount. I have also had to pay reconnection fees for their mistakes. Trying to get through on their helpline is also a worthless endeavor because you either wait forever to be helped or they just drop your call. I have only ever used MTN and I am now starting to think that I should change to another service provider because every time my account is suspended I am unable to use my phone, receive emails or phone anyone. I also have to go into a branch to be helped. There is never any kind of apology for what happens.