Swiggy — shown a fraud ad on app

Address:

Nashik, Maharashtra, 422009

Hello
Swiggy aap shows a ad of 100% cashback when pay through amazon pay. Inspired by this ad i was orderd food of 600 rs. But after payment they refund only 100 rupees as cashback.
I called to customer care of swiggy and amazon but both were declined that offer gives you upto 100 rupees cashback only. Then why you show us that 100% cash back even there was not term and condition mentioned in that ad. So i need my cash back.