Vijay Sales — Not got offer discount which have committed

Address:

Uttam Nagar

Hi Team

I have purchased a few products(Washing Machine, TV & Fridge from Vijay Sales (Uttam Nagar) on 08-Dec-2020 at that time there were offer if i purchase with HDFC credit card i will get the 5% cashback within 90 days but till now i have not received anything.
they told me that i don't need to come and do follow to Vijay sales store or HDFC bank i will get cashback after 90 days without any hassle. but no one had called me after purchasing.

It's been almost 4 months but till now i have not received the discount amount