Tring to get a refund for over a month now

I recently started a data contract with Cell C which was loaded incorrectly as an open line rather than a Top up line. While Cell C recognised the error and corrected the contract type, they have charged 10 times the amount that they should have and all attempts to have this rectified have fallen on deaf ears - I have requested that call centre agents to escalate more than 6 times and each tells me that the turn-around time is 48-72 hours, but no response is received from cell C and the process is started again the next week.<br> <br> Come on cell c - put your money where your mouth is and deliver service levels that show that you are capable of staying within the SLA's that you have created.<br> <br> Regards<br> <br> Ravind