RBL Bank Credit Card — credit card fraud

Address:

9, Kamleshvarpark Soc., Nere Ramapir Temple

I got call around 2 year ago and one of the rbl bank executive told me you are getting life time free credit card. Then i did procedure of card and i got card after few days.
When i open card envelope and i have seen annual membership fees of 2000. So i called to customer care immediately and told them i don’t want this card as you executive told me it’s life time free card. After that in few days i got bill without using a card for single time and also without informing me they did insurence i wasn’t aware of anything. Again i called to their customer care they told me it ll be resolved sir don’t worry but nothing happened i called them more than 10 times still they are not resolving and close my card without any charges.
So i have some proof of reference number of customer cate center with whom i register complaints which are as follows.

Ref id: 05395217
Moin khan
Date: 28/12/2018

Ref id: 05467865
Partik - 5 days k andar aayage call

Ref id: 05711975
Date: 11/1/19

Sandip: 16/2/19 10:25
Reference id: 06351908

Above are few details of customer call interaction i have done.
Recently i got call from mamita mishra on 07/09/2020 and i agian i told her all matter. But now they are calling my dad and tell him to pay bill as we don’t have use card for a single time nor i have set the pin and did immediate complaint still not getting any response from them and they are calling my father again and again.

Request you to help me.