Help with PayTM hotel booking

Hello,
I am trying to book a few hotel rooms from PayTM but facing a weird issue.
While searching on PayTM hotel page,rates mentioned are also showing cashback that I will receive but the actual problem is I do not know which code to apply to get that cashback amount. There is no mention of code that should be applied to get that cashback amount.All given coupon codes are giving far less cashback that is mentioned earlier.
Am I missing something here, or there is a code which gives that cashback.Almost 50 percent cashback is being provided on all hotels.

Kindly help me if possible.

Also are there ongoing offers to book hotels at good prices than PayTM??