Worst service ever and cannot resolve any billing

I was a customer with Nashua Mobile for many years. I was migrated towards the beginning if the year to MTN when Nashua closed. <br> 1. My voicemail was disabled <br> 2. My phone did not ring, not a valid number<br> 3 worst of all i have signed a contract with Nashua Mobile to limit my kids usage of cellphones. It is now the third month in a row that I am paying more than R8000 and noone can helpor explain where this is coming from. There shoud, be a block on the account. I have spend numerous hours on the phone and at the branch to try and resolve these issues. Just when I think it will be resolved, I get another account of R8700 this month. I have had so many issues and noone that can actually assist me. I need to honour my contract, but why do they not honou their side!!<br> <br> I have had enough. I have been a loyal customer for more than 20 years.