Street Style Store — Exchange products picked but no voucher given

Hi,
I bought couple of footwear from your site however the size of the shoes was big for me ( did not match the standard shoes size) & one pair was defective . The items have been picked up from me however, I do not see a coupon for the same nor have the shoes been exchanged & sent back . Have called your customer care number a zillion times but can never connect.
Order ID : 7823063!