Game RCS cannot give prove that account is up to date

I made a cash payment on my RCS Game account in store after being in arrears a small amount. I paid it up to date. Even a little more than the required. In the meantime I have app**** for finance at another institution and the payment does not reflect on the Trans Union profile and still show I am in arrears. I contacted the help line on the app and asked if they could urgently send me prove that my account is up to date. I was waiting at the dealer where I app**** for finance at the time. The lady said she would mail it to me. This was midday yesterday. I waited at the dealer promising them Game RCS said the mail is in its way. I waited there until three. No mail. They told me to go to the Game store to get a printout that will show my account is now up to date. I rushed there and spoke to many people of which not one had any idea how to help me. I was referred from customer service to the credit dept to the tellers at the tills and then back to credit. Here the guy called the credit dept. The lady there told him my account was not active for many years and unpaid and handed to a third party. What????? I use my game account most every day!!! I showed the guy my Game app which showed I have available credit. I asked just for a printout or screenshot or anything reflecting that I did pay my account the previous day and that it is in fact up to date. He told me he cannot do anything as such. There is no way to prove that my account is up to date. I spent and hour in the Game store trying to get just this simple thing and left empty handed. By that time it was after four. So now my finance application is hanging for the second day because RCS telephonically can confirm my account is up to date but cannot provide me any proof of this. Even after promising to mail it for me yesterday. This is pathetic service as any other institutions can make a simple printout stating an account status. So what now?