Street Style Store — taken money but didn't deliver my shoes

Website:

www.streetstylestore.com

I had ordered for "quest foot forward boots".
First they delivered the wrong size. Since i had chosen cash on delivery option i had to pay. When i requested for exchange, they took back those shoes and were supposed to deliver the shoes in the correct size. Since then i've been waiting but they didn't send the shoes. They aren't replying to the mails also.
Order no: 1664899