Shoe Show

I ordered a pair of shoes through shoe show online with a gift card. I ordered a size 8.5 and they sent me a 6.5. I understand mistakes happen but in less than 24 hours I have called 4 times, left 3 voicemails, and have sent 1 email. I have not gotten a return phone call or email back. I ordered a product and was not given the correct one and with human error, I understand that. but I would like the issue fixed and a phone call back letting me know the steps they are taking to resolve the issue.