frankthetank

I recently purchased a new pair of hockey skates at a store for $150 and when I got them home I found out that the skates in the box were really $600 skates! Now I did not want these skates as they do not fit me (wrong size) but I wouldnt mind getting the $600 for them. Any suggestions on how I can bring back these skates and get $600 back instead of $150? The only trick is is that I have a bill that says I paid $150 for the skates and the $150 skate box, but $600 skates. Any ideas?