MTN - POOR SERVICE

After numerous requests telephonically and via email I instructed MTN to stop a debit order that they were presenting to a bank account I no longer used. I paid my MTN account via EFT and that is clear on their side. I have also advised them on several occasions, yet they ignored my requests and kept on deducting via debit order, the bank account is now in debit with R2200 (rounded off) and the bank is holding me liable, even if I had closed the account at that time the debit order request would have re-activated the account. I have now been handed over to attorneys for something I tried my best to prevent with no action from MTN on my instruction. I have written to care@mtn - no response, MTN is liable for these fees on the account and I need them to resolve this asap. Poor service and no action.