Zara India — Exchange of a jacket

Address:

ZARA, G 73, Ground Floor, Ambience Mall, NH8 , Gurgaon, India

I bought a jacket on 25th Nov from Zara’s Ambience mall and have misplaced my bill. I want to exchange my jacket which has all tags intact but the customer care person was really rude and refused to listen.
It’s an expensive item and doesn’t fit well.

Can you please help here?
The store would have a copy of the bill and can check for the product quality.