Cant cancel my 8ta contract

I filled in my cancellation form and signed it 11 May already, and telkom still bills me. I have made more than 5 phone calls since then, to cancel it. No luck. The call centre only gives you the same, we will escalate it. Clearly nothing is happening, so I am paying for an account I don't use for the last 8 months!<br> <br> Secondly, I have a dispute with telkom to have a reversal on my account, because they took a month to fix my ADSL line. The still billed me for a line I could not use. No reversal, just pay or else we cut the line? Really I can't even use it. <br> <br> Very very poor service!