Flashstar Commerce — adidas men blue & black woven design helkin 3 running shoes

Address:

D1-202 satyamev judicial colony , gotri vadodara

Sir i purchsed addidas shoes from with 30 days return policy and i received my shoes but i have size issue too small size and i try with myntra company but they dont reply i unable to exchange or return the shoes... Such shoes i useless for me..
Even myntra dont show option of exchange or return shoes... Please as soos as poosible resolve my quary...
Date of order = 11 september 2020
Delivered = 16 september
Sold by: flashstar commerce through myntra.com
Mb no. = [protected]
Email id = [protected]@gmail.com