RBL Bank — super card bajaj - auto subscribed for r shield insurance

Dear sir/madam,
I am using RBL credit card from past 1.5 years, on October monday i received call regarding the rbl super card, they said at free of cost we provide you new card with additional features, i said ok, thats it, I receive the card with in 15 days they charged for R shield insurance worth of 15 thousands, i called customer 4 times they repeatedly saying the same thing like, they will contact you with in 6 days, but no one contacted me regarding this now my statement also generated still they saying the same, i also mail to all mail id provided by customer care but no response or replys from RBL side, without intimation they issued the policy and also converted into emi this looks like scam, I didn't expect from RBL.
Please help with my concern, or give me the solution.
CONTACT NUMBER : [protected]