Telkom's bad services for cancellation

I've been trying to cancel my telkom contract since September 2017, the contract end date was that month, they stopped deducting for the phone but kept deducting R49 a month for data. I went into a store and asked them how to cancel it, they explained that I needed to fill in a form and attach my ID and email to the necessary address. So I did this and waited, kept deducting, tried again in December and then again in February, I got tired of it so I just left it for a while. In April I decided to reverse their payment, so that they could At least notice my requests. But to no response, went to the store again in May, for the guy to tell me they stopped the email cancellation, I have to do it online now. So I did that.. a week later I get a bill of R602... to my shock, they billing me extra... the matter is still not resolved. I've tried calling numerous times to no help. I just want the contract over, I have no intention of giving Telkom anymore of my money. I do not recommend their services. I changed to MTN and their cancellation process is simple and fast.