MBD IS HARASSING ME.......

I am so fed up with MBD and their harassment. Wesbank handed my account over to them. I received a call from an agent of MBD telling me that their client (Wesbank) is offering me a discount and the amount that I need to pay to settle my account will be R4,864.34. I made this payment on 27 February 2022 so as to settle the account. I’ve sent proof of payment to MBD queries email address and to the manager by the name of Condradinah but I'm still getting phone calls from MBD asking me if I would like to settle my account. I’ve spoken to Germinah, Tebogo, Martha and each time I explain the same story to them. They’ll tell me that the manager (this Condradinah person) needs to send me a settlement letter but till today nothing. Instead, they keep harassing me by calling at least twice a day asking me for payment. PLEASE HELP PUT A STOP TO THIS!!!!!!!!!!!!!!!