Telkom and their billing system is up to ****

I have been having so many issues with my contract accounts with them. 1. They keep saying that I'm in arrears when my debit orders have not been returned. 2. Accounts department doesn't contact or cut the call half way 3. My bank account is debited on the wrong dates hence I am charged by my bank for RTD due to insufficient funds. 4. Telkom debits incorrect amounts from my account which is not in line with my signed contract.

I want a full refund for the extra bank charges that I incur for this. I want a full refund or my account to be credited with the additional amounts that have been deducted from my account.