Game stores over charging people who buy items from them

In 2019 I bought a TV which cost R10 000, and have been paying installments of between R900 and R1500 monthly since 2019, which means Ive paid over R50 000, However whenever I ask for a staments to see my outstanding balance I'm told this information cannot be shared at the shop. I eventually called their call centre and requested a statement, I spoke to a very arrogant customer services agent who very abruptly told me the statement is system generated and it will automatically send to my email within 24 hours. Needless to say the email did not come through 3 days later there was still nothing.Two weeks later I received an sms saying that I have an outstanding balance of R1200. I had been calculating that this is not right as I'd been paying monthly since 2019, meaning to date I've paid over R50 000 for a debt worth R10 000. Yet the sms came through stating that the outstanding amount of R1200 but when I called the store I was told the remaining dept was R22 000, It's like they don't know what they are doing. They don't speak the same language.

Game seems to be ****ming people who can't stand up for themselves. Their business dealings are ************, how can they not share information about outstanding balances with their customers, not even email outstanding balance on statements, it seems like they just guess an amount. I want all this money back that I've been pay over 5 years.