Pathetic Service from Cell C

I recently had to change my baking details on my Cell C accounts, this was done easily enough on the phone by the call centre operator. The consultant then informed me that due to the late change the debit order for the previous statement will still run of the old account and will therefore be returned by my bank. His instruction was to make a manual payment for the last statement and then the revised debit order will run from the following month. I made the payment and then this morning I noticed that the debit order still went trough. On calling the accounts dept I was notified that it will take 3 days for then to confirm the payment and then they escalate the query which will take another 2 days to process and if successful they can only reverse the debit within 7 days?? In the mean time I now have a shortage of almost R3000 (the debit order amount) on my monthly budget that will only be rectified after almost 2 weeks??? And this directly due to a \mistake"on the side of Cell C. Absolutely unacceptable !!! I currently hold 5 contracts with Cell C and at this point I don't think I will renew any one of them. """