Myntra.com — got wrong product

Address:

Jaipur, Rajasthan, 303002

Hello sir,
I have ordered a roadster jeans worth 712/- and a t shirt worth 290/-, yesterday i got my order. And i noticed that the jeans was different from the original one which i have ordered.
So what should i do return or exchange...in case of exchange size will be exchanged but again i will get same wrong jeans...in case if i return the jeans... I will get the whole 712/- refund or the delivery charges will be cut from that money for t shirt.
Since i haven't paid any shipping charges.. Bcoz order was more than 1000/- rs.
Sawan kumar chhipa
Mob.[protected]
Order no.:[protected]-5410103