A student of mine bought her first slr camera from...

A student of mine bought her first slr camera from your store. One of the employees sold her a Sigma lens and Canon body which were incompatible. The lens is meant for dslr with a crop frame sensor. She shot two rolls of film in which the majority of her photos were seriously vignetted. When she tried to return the lens, albeit past the ten-day return policy, she was refused a refund. Seeing as this was a mistake on the part of Richmond Camera, she should at least get to return the lens and comped a couple rolls of B&W film as a sign of good faith.