Cell C debits incorrect amount

Cell C debited incorrect amount from my account and now their policy does not allow them to deposit back the extra amount they debited. I'm told I should wait for that money to be credited on my next invoice. You have deducted incorrect money, pay it back, it's called INTEGRITY. You are *****ing my money and hiding in your policies. When you debited incorrect amount did you forget about the policy clause that state that you should be HONEST to your clients. I need my money into the bank where you stole it.