PAID UP LETTER ASAP

Telkom has the most horrible service that they even have guts to rate the service at the end of the call. I was never contacted that I owe telkom R142 only saw when my credit score points went low. I have then paid R142 into their account details that they have provided on the 13th October 2020 which they have confirmed receipt payment when I had followed up on the 14th October 2020. I have then requested for the paid letter and they are giving me run arounds. Firstly its hard to get hold of their consultants who cannot resolve my issue. The 7 to 10 days have already passed and still no paid up letter. If its not 48 hours its 24 hours. I need that paid up letter ASAP as I need to clear my name