Their bookstore bought a book from me via Amazon....

Their bookstore bought a book from me via Amazon. They left me negative feedback because of the condition and the price of the book. They ordered a good condition book. I sent a like new condition book via one of my suppliers. There cannot be this much discrepancy. Even if there is an issue, I do not think it is fair to hurt a small business without contacting them. Their feedback sounds they wanted some refund using their feedback power on Amazon. I happen to be receiving negative feedback from this type of institutions or their employees. I really do not want to generalize or be prejudice about them but my statistical brain tells me something wrong here.
I read their response to my post. There is no doubt on my side. She never contacted me. The book was ordered from this address:
Patrick Henry College Bookstore
10 PATRICK HENRY CIR
PURCELLVILLE, VA 20132-3197

I am willing to work with you to resolve the issue