Telkom refusing to cancel ADSL

I went to the Telkom store on 7 February to cancel my ADSL and all services on *** (***) because a got an Telkom LTE contract which made the ADSL redundant. The store send the form I filled in to an email *** in which I was cc'ed. Unfortunately Telkom kept deducting R579 form me. Then I tried calling customer care after which I was put trough to 5 different people and I eventually ended up at a person which said they will put a "note" on my account. Yet again Telkom deducted money. Then I myself send an email with the cancellation form to *** on 17 April. After which I got conformation that the service will be cancelled via sms, but yet again they deducted the same amount on 25 April. In total Telkom deducted R1737 for a service that I cancelled in February, it feels like they are steeling from me. I have done everything a client can do, I went to the shop, I called and I emailed and nothing has worked. What can I possibly do more???