Indiabulls Dhani — My cibil score is affected due to this dhani card, I paid all the amount.

I used dhani card and paid all the amount and requested to close my account,
They are not closing my account and charging me 680 RS per month for card charges, I called CUSTOMER care no response, I have sent num of msgs, no response it's been almost 6 months
I have paid more than 3k for card charges,
My cibil score is down due to this dhani ### app.
Now I'm not eligible for any personal LOAN.