Incorrect account, no support to correct mistake

I received an incorrect account from MTN. <br> When opening an account for a Samsung Tablet, I placed a R0.00 limit on the account. MTN never checked this and the amount reached over R6000. After months of correspondance MTN finally admitted that the mistake is theirs. <br> Instead of giving me a credit they deducted R10 000 from my bank account!!! This is after I signed a stop order with Nedbank AND I have been paying my account every single month. I simple wanted to avoid them deducting this huge amount. Instead of doing that they added another R4000 and deducted that from my account. <br> <br> The so called customer care is ridiculous, I have received almost zero help and it has been dragging for months! I will never again open an account with MTN.