[Resolved]  ICICI Bank — Demanding more than my outstanding balance

I have been using Amazon pay icici bank credit card for the past year. But last year my husband passed away and I resigned my job and I have no income now.
I have an outstanding due of Rs.1, 59, 000/- and I paid Rs.1, 00, 000 already and willing to pay the rest as well now itself.
But when I called the bank customer service they said I need to pay extra 80, 000/- stating different interests and demanding me Rs. 59, 000+80, 000/- to close my card.
I'm in no way can pay extra 80, 000/-.
What am i supposed to do now?
Whom to contact and whom to complain?
Ombudsman?
Or whom?
Can I have their contact number or email?
Thank you.