Caution when Attorneys offer discounts from ABSA

My wife Mrs.R .Naidu took out a personal loan with ABSA and ran into difficulty with payments .The account was handed over to Nortan attorneys who made arrangements to pay this account .Last year we were contacted by an agent from Norlam stating that ABSA was offering a 20% discount.The amount outstanding was R7813.76 and after the discount the amount was R6251.01which was to be paid in four monthly instalments of R1562.75. Payment was done in December2019 ,January ,February 2020.Due to the lockdown we were only able to pay in June 2020 when we got back to work.We spoke to and agent before payment was done who gave us the final amount of R1615.33 which was paid on the 26June 2020.She also stated that after payment the account will be closed. On the 16th August 2020 we received a statement from ABSA stating that we owe R2973.07. We called Norlam attorneys and spoke to Christopher Ramahlodi who says we never accepted the discount offer. He further said he checked the recordings and when asked about the recording of the June 2020 conversation with an agent he conveniently cannot find it. Why did nobody query the amount that paid in December/Jan and Feb.Why would we pay a specific amount if we were not asked to? ABSA and the attorneys are dishonest and trap people into believing they are offering discounts but when paid up they now want the balance of payment including interest. DISAPPOINTED .