Frustrated with service and signal

I have been a contract customer with MTN for over 20 years, over the past 2 years I have had problems with signal, internet connection and terrible customer support.

Now my son bought an mtn phone, 3 months ago and and has been cut off every month due to his prepaid sim card not being used which he has data on it for whatsapp only no phone calls.

I phone 135, the only number that now works and the only way to speak to a person is by selecting "upgrade or cancelation", only to be told I must call the same number from a prepaid phone. Well how the hell can I call from a prepaid number if the phone is blocked.

I cannot believe that the company has been downgraded so much, that they cannot assist me on their support line in the same department.

My contract is up for renewal in February and if this is not dealt with in soon I will not be renewing my contract with MTN and will be porting to a competitor company.