Number cut off on post contract.

I am past my 2 yr contract and on month to month basis. I have tried to stop the month to month contract as i am not earning a salary due to COVID, however cant get through to 135. I have tried for days to get through. My number has been cut off completely cant receive incoming calls either. I have honored the 2 year contract and i would understand if you stop data and outgoing calls. But MTN blocked incoming calls aswell. I do not think that is fair. And for this reason i will NEVER go into a contract with MTN again. Blocking my number from incoming calls has caused a lot of damage.