Brand Factory — wrong pricing of the products

Address:

Acropolis Mall, Thaltej, Ahmedabad., 380054

I visited brand factory located at acropolis mall, thaltej, ahmedabad on 20/05/2019. They are just fooling all the customers.in an ongoing unbranded to branded shopping festival, they are not providing the discount specified on vouchers as rs. 150 for some mentioned brands, which is otherwise 100 per voucher. It is only when i pointed out and they had to provide it.
Secondly they are charging 5% gst over and above the product mrp.