Nimble Collections are *****s

A lady by the name Nozuko from Nimble has been harrasing me, called and told me to pay the amount of R9346.96 to settle my Capfin account (discounted at 25%) which I did pay on the 20th of March 2021.

But days after paying the said Settlement Amount I get an sms with a link that shows that the account still owes R2573.78.

What does this mean, was the 25% discount a way of tricking me so that i make payment to the account ? Or is the account officially closed.

I believe they are *****s and ******* me as a consumer knowing that I wanted a clean Credit Record