Incompetence from RCS

I am very dissatisfied with the service I am receiving form RCS group on my Game store card . On the 29 September I visited a Game store store in East Rand Mall to inform them about an SMS that I received regarding a suspicious transaction that took place from my store account. Then they assisted me to complete a dispute form for the transaction for R3000 from my Game store card. I explained that the transaction took place at night and I had the card in my Possession. I don’t know how that transaction was done as I did not receive an SMS with a OTP. Then I was advised that the investigator will contact me within 21 days to complete the investigation. 2 months later I’m still sitting in the dark. When I contact the call centre to follow up they tell me that the investigator will contact me. I am very frustrated and my patience has ran out. I need this resolved asap as I am now paying R200 extra on the instalment due to the R3000 transaction that took place. I am also sitting in this mess because of RCS incompetence. I called in twice to reduce my limit and was told that it has been done. Only to find out it was not done. I want this resolved so that I can settle and close this account