I just bought a pair of Wilson WildCard 2's from my local shop. I got them at a discount so i figured i would try them. I went out to play yesterday and played for no more than 4 games. The insole of the right shoe became extremely loose and i could not use the shoe anymore because it was moving all around. Should i be able to return them for new ones? The guy at the shop said since he cant sell them as new he cant take them back, but since they have a defect doesnt that mean he would send them back wilson and i should get new ones? Thanks for any advice.