Bad service from CellC

I called CellC on the 1st of November 2022 to give me a settlement on my account so that I can pay it and cancel it, the lady took me through the cancelation process which I followed but to my surprise in January I was billed for it. I called again and they said it was still not canceled, then in February they deactivated my lines saying I have to pay R900 which I did and I still asked them to please cancel as I will not afford paying R900, they send someone from the retention department to contact me but I explained that I cannot afford to pay 4 contracts anymore so I need 2 to remain active and 2 to be canceled. Today I'm getting a bill of over R2000 which I don't know what's it's for. This is messing up my credit profile. I need cellc to refund me not to keep billing me and threatening to deactivate my services. I can always port to other networks I just need this to be resolved.