Club Factory — size not received as per order & refusing to return

Website:

www.clubfactory.com

A have placed order of 3 pcs shorts to this company. Order number so36923485 of m size clearly mention in order form & they have send xxl size of it which is not as per my order. I requesting them to send my size as per order they are saying swimming costumes & underwears are not refundable.
I respect there policy but they should send order & size as per order form else inform in advance they have finished with particular size.
So need help in this fraud they have done.