RBL Bank — credit card/I have been asked for settlement but they are not doing it

Address:

RBL bank, Hyderabad, Telangana, 501301

Am using rbl credit card from last 1.5 years and i wanted to close my card by doing a settlement with bank but the rbl bank people are not interested in settlement. I requested them to send an official email confirmation from bank but they are not sending the emails but calling me many times for the same issue.

They are not behaving with me when i asked them for the settlement and giving me mis leading oral information rather than sending me an email on the same.