Paytm Mobile Solutions — unethical behaviour in selling deals and vouchers lenskart

I got a deal(order no.-[protected]) from paytm which advertised of getting 100% cashback on lenskart gold membership voucher and displayed a link to buy the same .Then i purchased lenskart gold voucher(order no -[protected]) from the given link for Rs 500 .But i didn't receive 100 percent cashback as advertised in deal .Also to redeem the bought voucher i have to buy atleast two specs from lenskart which isn't mentioned in deal. This makes it a discount voucher not a membership voucher as advertised. Also on multiple queries for past three days I am getting the terms copy pasted as a message and sms to call a number([protected]) that doesn't exists.The deal is wrongly advertised and with confusing terms which essentially result in getting a deal for cashback which doesn't work, buying a voucher which is a discount voucher not a membership voucher applying which results in less discount than you can get without buying the voucher (using lkcash and rush promocode in lenskart).