MDB not doing their job - offering discount & then not allocaring my payment

I contacted Munnik Dagama Basson Incorporated All calls were recorded I requested settling the debt I was repaying monthly I asked for the final outstanding amount Then I asked for discount The operator said the supervisor granted 20% This left the outstanding amount to R 8 127 I requested the amount be taken with the monthly debit order I was concerned when the money was not deducted from my account In a recorded conversation I was advised not to pay the amount immediately As the was a debit order showed pending Finally, on 29/07/2024 I received their Banking details I paid R 8 200 into their account on the same day I kept on receiving calls from MDB daily at 7 am I kept on sending a screenshot of the payment because every time a different person phoned me I even visited Standard bank twice to settle this but they couldn't assist Finally, we picked up that the reference I used omitted a "2" Still, I received calls every morning at 7 Every agent said the same thing - They will write it on my file I even e-mailed the info MDB's office stopped calling me and I figured they finally got their act together But they started calling again They are insisting I pay even more money as their 20 % discount "lapsed" as I "did not pay in time" This is unacceptable I suggested they refund me the R 8 200 and reinstate the debit order They refused On Friday 20/09 a very rude consultant phoned and insisted I admit it was my fault that I paid by 29/07 I refused May I please recieve a Paid up letter for this account May it please be removed from my credit report Alternatively may they please refund my R8 200 They can reinstate the monthly debit order May they please never call me again