RBL Bank — credit card settled but asking for rest amount

Hi

I have a credit card number ending in 9935.

In march 2018, i had agreed for a settlement amounting to rs 58000/- out of rs. 1 lakh. Now in feb 2019, i have paid all the amount according to settlement. But now when i ask them to send ndc, they call me to pay rs 48000/-.

When i have paid the settlement amount, then why should i pay the rest amount, what is the use of settlement?

They are calling me from different numbers.

On my denial for payment of rest amount of rs 48000/-, they threatened me for legal action.

Call details of vivek kumar is also attached.