Keeping me in debt

I want to close my outstanding owing amount to MBD but they just can’t seem to give me a settlement letter as well as a statement, the account is 15 years old which was handed to MBD from ABSA, we have tried negotiating a better settlement and fair enough to MBD, they managed to give us 25% off, the issue is trying to get a statement and settlement letter, so that we can close the account and they can send us a paid up letter, I am afraid its been 3 weeks since we requested a statement and still nothing, a manager by the name of Lloyd Leone replying , saying that he requested it but nothing doing, they might take another two months to furnish us with a paid up letter once we settle the account, there is also an organisation called Nutun that is involved here? The issue with these collectors is that they quick to threaten but when we want to settle then they take their own time, our next stop will be pleading with the NCR because here we want to get out of debt but debt collectors like MBD want to keep us in debt, we just want the following

1. The settlement letter with the amount agreed on email 2. The statement over the past 15 years, so that we can compare the outstanding amount 3.Paid up letter within 3-5 days once we paid up the settlement