No settlement letter

Took a personal loan with standard ban in 2014, unfortunately I struggled with payment and the account was handed over to MacRobets attorneys. I received a letter on the 12th July 2019 with 20% discount to settle the account, which I settled. A number of emails was sent to Macroberts to provide the settlement letter to no response since 2019. I contacted standard bank on the 27th October 2020 and the response on the 28th October 2019 stated that my enquiry was handed to the landing department which has not responded.