Disgusting service treated like a ********

Terrible service my parents are divorced and by mistake doubled up on buying cycling gloves for myself my brother and sister. The intention was to keep the gloves so they threw away the slip we have sold our bikes and do not cycle anymore i went in to sportsmans warehouse to exchange the items and was treated like a ********. I want this situation resolved as they spent good money on the gloves and now its a waste. Will definatly never shop there again.