IndiaBulls — Calling everyday 10 times at least even though payment was made

I took a 3 lakh rs loan from Dhani app
Last month Mr Navneet called from Dhani and asked for full payment
I paid is full a sum of 60, 000.
He said now loan is full and final.
The employees at dhani have called me at least 30 times asking for payment of some 600 rs which I don’t understand what it is.
Multiple times I have explained to them that loan has been paid in full. Still the calls are not stopping.

Please help me
They are calling more than 10 times every day
Every time new caller
I have to explain again each time
He promises that he has updated and no more calls wil come
But still they continue calling
Huge amount of harassment happening to me