Smr Infotech — harassment and pushing to pay for fraud holiday coupons

I also got a call and asked me to pay 8490 on a link. They offered me some free gift and free vouchers.
When i refuges started harsh language. If i not paid said amount then i have to pay bout 11200 for cancellation fee.

This is pure cheating. Two years back one of the credit card was offered at rs.6500 and along with some gifts and vouchers were sent as a promotional offer.

Now they are saying you have selected for the same to continue and you have to pay for rs 8490 or rs 11200.

Now matter visa denying that they not offered credit card, they were offered visa master card.
Company not providing any mail. All they do on phone call.
What to do if the payment is credited on account?