Paytm Mobile Solutions — hide & seek promo code failed

I have brought a biscuit today named hide & seek from a store name - patel r mart
As it has been assured on that biscuit that i will get paytm cash on my wallet
So for the first try i downloaded your paytm app but when i entered the promo code it said it is invalid
I got a poor experience for my first time on paytm
So please fix it as fast as possible and send me the money as per your conditions.
The promo code i got on the pack is-
Mal6ydzrrwzf6z6
Fix it as fast as possible
Thank you...