No exchange, pay double for your item what service is this ???

I ordered shoes online, even paid express delivery fee to have my order arrive sooner. Shoes were too big , when I tried to log an exchange Reebok advised they do not exchange?? How can you have an online store an not offer exchange people are not able to try on the item so the chance of exchange are extremely high. Ontop of this they want me to log a return wait 4 days for the item to be collected and then place a new order at whatever the new price is listed ?? Why should I loose out on a item bought on special because Reebok doesn't have correct exchange policy in place ? Even a company like superbalist offers returns . After reaching out to Reebok support they advise me to purchase the item again and then wait for refund on the other item for 2 weeks.. is this a joke , why must I pay for something twice before I receive the correct size? This has been my worst online shopping experience, there has not been an inch of assistance from their so called support email address either . don't even bother buying from Reebok waist of time and money!!