Old mutual money acc

I wrote a review on the old mutual account two years back and it’s still unresolved, over R10000 debited from my account which I never authorised and they still haven’t refunded my money,I could take it up with the banking ombudsman as they’re not recognised as a bank, however they’ve given me the impression it’s a bank,I have countless emails which still have no resolution. I’m not willing to let this go as R10000 is a lot of money and I want it back