Poor service for contacts ended

I've a been client for many years and always got great service. But when i had to cancell my services, because of circumstances the service changed, why? My contacts ended in July 2023. Now after numerous calls and emails my account is still being debited every week with R70 that has been paid 21 December 2023, and numerous references, and now again this morning my account was debited R70 now my bank changes is in arrears,,. I've been notified on email Monday that the pmt has been allocated, but that happend this morning!!!!!! who will be liable for the bank charges after the agent confirm in December 2023 that the R70 paid 21st is the last amount outstanding to pay? I really want this resolved. My credit score is being affected. I'm out of options tried my best but this is now getting out of hand. Please I'm now desperate for assistance.