Account already settled

This account was fully paid for on the 1st of March 2016. The payment was made from a dollar account and the proof of payment was sent to Game. Game then captured this account incorrectly and instead of capturing the Rand value they captured the $ value as the Rand value. My debit order still went off on the 1st of March 2016 even thought the account was paid but I understood that it was too late to stop the debit order and my account will have a plus value at the end because the debit order still went off. I then noticed that I was billed at the end of April. I requested my bank to stop the debit order seeing that this account was already settled and I spoke to Game and they informed me they are aware of the issue and they are busy capturing it. It is now the 11th of April and they are STILL busy capturing it. I am receiving sms's as well as emails from Game informing me that my account is in arrears and they have now put a stop om my account, even though they are 'aware' of the capturing issue on their side! Plus I am getting charged interest where my account should have actually been over paid together with the March payment that still went off! Phoning them does not help