Pathetic Service from Standard Bank and Mac Robert Attorney - you running a CIRCUS

I have been a prestige customer for more than 15 years. I sold a property and there was a shortfall which I then signed an Acknowledgement of Debt for. There was no communication from Standard Bank that Mac Robert will be handed over the account for collection( CANNOT UNDERSTAND WHY AS WE HAD A DEBIT ORDER IN PLACE FOR THE BOND) I was livid when I received a FINAL DEMAND from Mac Robert Attorney for the shortfall. I ignored that email and sent an email to the Standard Bank Attorney (Hannes Gouws & Partners(JHB)INC) which then sent the email to Latham Swartz from Standard on the 30.09.2020 up until today I have not received a reply on my email. On the 01.10.2020 i received a phone call from Mac Robert Attorney(Mathilda Rampeng) and explained the scenario above who then requested payment. So I asked for what payment as to my knowledge payment was suppose to be made 30 days after registration and I am well within that time frame as it was only transferred on the 23.09.2020. On the 02.10.2020 I received an email from Mac Robert Attorney at 22.22pm from email address "***" requesting a full and final payment with interest and yet I confirmed with Mathilda Rampeng about the interest and she advised that there is no interest charged on the account what we pay will be deducted from the account. This is not the way a client who has dealt with Standard Bank for so many year should be treated and I personally always thought Standard Bank was a NUMBER ONE to deal with, Sorry but definitely not after this circus I am working with. I am totally disgusted with the lack on communication from STANDARD BANK and also MAC ROBERT Attorney who is so unproffessional. I would want this emails and harassment from MAC ROBERT attorney;s to stop and we have a proper arrangement in place going forward. Cannot understand how Standard Bank could appoint a mickey mouse company like this to handle there collections and keep sending you emails FINAL DEMAND when there is an arrangement in place. Totally pathetic and would definitely not want to deal or recommend anyone to Standard bank, your service is appalling.