TELKOM - debits customer account for non exsistant contract

I have a data contract with Telkom now going 3 years from 2021 right up until now Telkom as been robbing me debiting my account for a contract that was canceled when it finished and now they are double debiting my account when they feel like I have done a recon from last year until now and currently Telkom owes me R581 and now they disconnected my service and tell me I owe R280, 04. No one at Telkom. Is competent to do accounts and I cannot get through anyone to assist me with my issues. And as a customer it's frustrating. Now because of Telkoms useless nature I must suffer with my name getting listed for no particular reason and my service getting suspended