Poor service - Billed 7 months for a service I do not receive

I cancelled my 2GB bolt on service in the beginning of the lockdown which was in April via the MTN app. After emails back and forth with MTN customer care, this has still not been resolved. I am being billed for this every month and no longer receive this with no assistance from MTN. My contract is paid in full every month. Now that I did not pay for the 2GB bolt on data bundle, which I do not receive anymore for 7 months now, they have suspended my contract. This is unacceptable service. I would not recommend anyone to join this cellphone network.