Transdeals.in — no response from this fraud company

I got a call from this company claiming that they are calling from kotak credit card. They have made all the false promises of discount card and holidays. I really doubt if all these discounts are valid. Because the brands which are give in there booklet, if we buy with those brand they refuse to accept the card. On calling there customer care they say you will get a voucher if you pay us and you will give he 10%-20% discount. I have paid 8499/- to buy this card and feel today used by these companies.