Account falsly updated by ITC

I settled my Game account in 2014 and was told there is a R6 outstanding which I need to pay to close the account. I paid the R6 and in the store wrote a closure letter and faxed it to Game. Alicia @ Game had a copy of the letter and would follow up to make sure that head office received it. A week later I went back to see if the account is still open and my card was blocked because the account had been closed. The 2/11/2015 (A YEAR AND & MONTHS LATER!!!!) I app**** for a cell contract and was declined because my Game account shows in arrears by the ITC for R6 since April 2014. This is completely unacceptable and humiliating! Because of Game's incompetence my ITC is showing bad debt??!! I phoned customer care and was informed that on the system my account shows closed so it was never/wrongly updated by the ITC. I want this to be wiped of my ITC by Game since I can't do it on my side. I expect an immediate response and that this must be resolved immediately or I will have to take further legal action.