MTN A COMPANY GREEDY

I have enough now with this company. They put me on a wrong deal and I sent an email cancelling it, and I told they to send me my invoice, but they didnt instead they debited R380 from my account but I reversed it. Now the debited again and amount of R630 which I dont understand because I told them to cancel my contract because they have breached our aggreement.

If you (MTN)not resolving this, I will have no choice but to consult my lawyer. You are a greedy, scheeming company who doesnt care about the clients but your company.