Refusal to release a paid up account and issue paid up letter

i had a settlement agreement on my credit card with one of standard bank lawyers. I paid according to the prescribed terms and completed on the stipulated time, which was the end of October 2025. I have been requesting a paid-up letter from the listing lawyers, MBD Incorporated, and Standard Bank for over a month now. the said 7 days had lapsed a long time ago. I have been calling MBD on the regular, no one is offering a solution, and Standard Bank also keeps telling me they will escalate. I am frustrated and held hostage by these delays.