Settlement balance paid but account in arrears

I called in to get a settlement balance of my account. I then proceeded to make a payment for and sent through proof of payment. I didn't got get a response and then contacted them to confirm if they had received my payment. They said YES and that it just needs to be allocated to my store card. They advised this process takes 14 to 21 working days. I did a few follow ups in between that timeframe and kept getting told something different from each agent that I spoke to. I specifically asked them to confirm if the bank details were correct and they said yes. A month goes by after sending proof of payment and I get an email stating that the bank details are incorrect and that I must contact my bank to track the payment. I contacted my bank and there was nothing they could do for me since a long time had lapsed. I eventually went to an ATM so that I could check the account holders name that I paid into and found that it was infact MASSTORES PTY LTD. I then went to a game store and spoke to someone face to face. She then proceeded to do the exact same thing that I did in the beginning which was to send proof of payment and ask them to allocate the funds. Whilst at the store they dialled in RCS and I spoke to an agent Bilkiss who said they will TRY have to this matter resolved and HOPEFULLY they will be able to allocate the funds. I was told they will give me a call back to give me feedback but to date there has been no movement whatsoever. To top it off my account is now in "arrears" so I paid a further R1500 out of fear that my name is going to be blacklisted. I was told not to worry and that when the funds are allocated all those charges MIGHT be cancelled. So I have no idea where all my money went and I have received the worst treatment not only from game but from RCS as well. This issue has been going on for two months now with no resolution whatsoever.