Balance of loan not going down

There is an account (Cape254034) that was handed over from Capitec Bank (Acc number:***) to Nimble on the 09th of April 2021 with a balance of R140 166.41 and there has consistent payments paid from Aug 2021 or R3000.00 however the balance has never reduced instead went up to R160 552.08 despite an amount of R45800 being paid to date on this account. I need this balance issue resolved, I went to the bank and we called Nimble collections, none of the two institutions want to take responsibility for the interest being added. As right now my balance should be lower than R100K