Billed for international roaming and never even left SA

I received a bill from Telkom on the 3rd of Sept showing R2715.16 for calls made while roaming, I then immediately reported the issue to Telkom (case no: ********** 0). I have phoned numerous times every week thereafter to follow up and each time the agent says they will escalate the matter to billing department.... Now 15Oct after all the debit orders went off, Telkom suspends my service and now I cant make any calls or use data on my phone, so I phoned again and they will "escalate my issue to billing department ". It has been six weeks now and still nothing is resolved and my phone is still cut off! I am at boiling point and will never recommend Telkom to anyone ever again!