RBL Bank Credit Card — R Shield Insurance

Last month I received my RBL Credit Card and after getting the card I activated it and did my JIO monthly recharge. Then I went to see the balance and become surprise to see that there is outstanding unbilled amount of 15199 rs. Then I went to check the statement and found there is one insurance activated in favour of me of rs 15000. I tried to call them several times but they never respond. Then I mailed them so many times to cancel the insurance. But the did nothing. Then I mailed the respective insurance company and my insurance got cancelled and the amount returned in favour of RBL BANK on 23rd May 2021. I have the insurance cancellation receipt. I mail again to RBL BANK to check the insurance and credit it to my card. But till now it's not reflected on my card statement or in unbilled amount section. I mailed them on 25th and 31st also regarding the same issue. But till now no reply. Even today then mailed and SMS me about the Insurance EMI payment and told me is I don't pay the amount till 3rd July they will charge 15% interest as LPC. Please sir please help me to out from the situation. I will be very grateful if the outstanding amount will balance with the insurance cancellation amount and cancel the credit card. I don't want to use it anymore. The remaining bill which I have used I already paid. Please sir please look at the matter and do the needful to close the card. Thank you.