Getting my money back

I have a telkom mobile ****le contract,which a monthly debit of R299 is debit on the last day of the month. On the 17th of september i paid R598 which was due.On the 29th of September telkom debited R897 from my account instead of the R299.I phoned them and they said I need to wait a week for it to reflect on their system. A week later I phones them and they logged a case saying I would get a reply in 72hrs. On the following Monday i was busy with a client and I missed their call(ONE CALL) and they didn't bother trying to phone me back!!!!!! On Friday I once again phone to have them say they have now closed the case cause I missed that ONE CALL so they will email the billing department I told them they need to call me that afternoon. I sat waiting for a call I never got. TODAY I phone them,they sent an email and I told them between 9:30-1pm they need to call as after one I will be busy with clients...and I have still not received a call.<br> I'm appalled by the billing service I want my money back,it's been nearly a month and telkom have not paid me back.after one missed call telkom doesn't bother to phone back or do a follow up call.<br> Absolutely Disgusting