GAME ********** TRANSACTION - NO RESPONSE - PATHETIC SERVICE!!

I settled my account on the 1st March, and requested that my account be closed, however on the 06th March, a ********** transaction took place on my GAME store card, and I immediately contacted the support number provided on the SMS to advise them that I was not the one who processed the transaction. I sent through all requested documents to the ***** division, called immediately after sending the email (the 1 time I was lucky enough to get through), & was advised that the ***** department confirmed receipt of email in your inbox and advised that it would be allocated to someone in the department, however STILL NO FEEDBACK FROM ANYONE, not even an email advising that it was received, with a reference and/or the persons details who is dealing with this matter. However I received a statement reflecting this ********** amount, which I am not responsible - I settled this account and requested that it be closed BEFORE this ********** transaction took place. The worse about all of this is that the 1 day I was lucky enough to get through to someone, as mentioned above, I was advised that this ***** thing is the norm and it happens on a daily basis, which I think is ridiculous especially for such a large business, and you should be doing alot more to protect your clients. I am in the process of purchasing a new property and this is now a huge obstacle now, as this amount is reflecting on my credit record. Please could I urgently have this reversed, and account closed immediately. URGENT FEEDBACK WILL BE APPRECIATED, AS IT IS NEAR IMPOSSIBLE TO GET THROUGH TO YOU TELEPHONICALLY, I HAVE BEEN TRYING EVERYDAY SINCE LAST WEEK, AND EVENTUALLY PUT DOWN AFTER AN HOUR OF BEING ON HOLD & THIS COSTS A FORTUNE.