Account under investigation

I have opened a dispute with GAME for a ********** purchase done on my account. Prior that I have been paying my monthly installments without missing any month. Now since the amount due on my account is incorrect, it affects my installment and interest. I have tried to communicate this with the GAME consultants that have been calling me. However I am still threated that my account will go to their legal department. It is frustrating as I have not gotten any update from the ***** department pertaining the investigation. I cannot be expected to pay interests for a purchase I did not make, and my installment cannot reflect that. It seems the different departments at GAME are not communicating, if an account is under investigation surely this reflect on all of your systems and I should not be harassed every other day by your consultants. Please fix the amount due so I can make payment.