Unresolved dispute unfairly increasing account credit

Good day

I have an RCS Gamestore card which I was enjoying and paying well always. Around May 2019 there were unknown transactions which went through the same account which I reported to their ***** department. I was requested to submit documents and statements logging a dispute which I did. I made follow up calls where their call center confirmed to have received documents and still doing investigations which was never concluded. Recently I sent statements that I an amount which is even more than the credit I have with them. Due to being unhappy I decided to not even pay the required installments which is wrong from my side and willing to correct. My account number is ***. By the time of this unknown transactions I was owing around R 16 500.00 and currently it is at R 23 000.00 which I think is completely unfair.

Hope for an amicable solution

Kind Regards Unhappy Julius