Dishonest bunch

I had purchased 3 pairs of shoes during the black Friday sale via total sports website. Total sports sent me an email confirming my order was successful. A few days later after the black Friday sale was over, total sports sent me an email to advise that they had cancelled my orders due to stock availability and website errors. They offered a refund which I refused considering that I had purchased these items at a 50% discount. Their actions have placed me at a disadvantage. Had their website worked properly then it would not have showed the shoes as available to be purchased and i would have gladly selected other discounted shoes from them or other stores. Total sports is this how you treat your customers who have entered into and agreement with you which resulted from your offer? I have called you on 4 different occasions but you refuse to hold up your end of the agreement. Pathetic. To date no attempt has been made to resolve this issue.