Horrible service and paying for service im not receiving

I signed up for an uncapped wifi with telkom in October i changed the debit order details which they confirmed it has been updated. They then went and debited my old account and the debit order was not provided for. They suspended my wifi and i paid at Checkers using the easypay number and im being told the funds do not reflect and i sent the proof of payment. My old bank account was then double debited and still my wifi is disconnected. I do not have interest in this horrible service and want this account cancelled.