Insane Interest Rates to debt Review Clients

Good Day,

I took a loan sometime ago at Capitec and after a few years unfortunately had to go under debt review. My debt review company has been paying Capitec every month, and my initial loan was R35 000, after all these years that the debt review has been paying Capitec, the amount has not decreased. It shows that i have paid Capitec nearly R50 000 already and that I am still owing R32 000??? Could I please get some assistance regarding this? This is not acceptable. How can the interest rate be decreased as this is the only account still on my debt review list?