Charged for years of non service , accumulation of monthly charges

I have called in when this account was sitting on almost R2500 years ago . I have tried numerous times to close the account.This has been an ongoing battle with MTN. My last call was about a month ago and I stipulated that I needed to end the contract . was once again told like all the numerous times before that , that I could not do that as I needed to pay the approximate R9000 at the current time. I clearly stated that this keeps happening and that I insist on this account being closed.This has fallen onndeaf ears andvim told that it cant be done. I have reached the end of my tether with MTN who will keep this account open until I can pay the outstanding balance that just keeps accumulating . These numbers have been suspended for years now but the charges just continue to accumulate monthly. I don't understand how MTN on a month to month contract can continue to add these monthly instalments knowing full well that these numbers are no longer in use and there is no benefit. I am being charged for services that have not been rendered and I am absolutely tired of this. Is this in line with Consumer Protection Act? Is this aligned to MTN’s code of conduct?

I want these month to month contracts ended, MTN please stop charging me for a service not rendered

Please see clause from MTN commitment, that also seems to be ignored by all consultants