Fashionandyou has very bad return policy. You cannot exchange your clothes for bigger size rather you have to cancel the order by phone and then by email.
You wont get your money back but in form of points. The entire process of collection of item and refund in points takes more than 15 days. I faced this problem when I tried called them up. The call costs me more than Rs 10. They do not have a toll free number. Hence think before you order ready made clothes though there collection is good