Snapdeal — Not giving discount on cod when the bill on their site shows discount is given and selling product more than MRP

Hi..
Don't trust snapdeal. I ordered one neutregena fine fairness mask (Rs 89)using the first purchase discount of Rs 50 . My order number was[protected]. It showed I have to pay Rs 39 on COD. But when I received the package it was printed I have to pay Rs 89 with no sign of discount . Bitterly I paid the whole amount and took put the product to see if it was ok and to my disappointment I found out it was a limited offer pack with Rs 26 discount . So I paid more for the product than it's MRP. I'm not going to buy from them again. Beware of this site, overall it's a bad experience for me.. I fell for the discount and ended up paying much more for the product .