A webpage with Barnes & Noble's "terms and conditions of use":
http://www.barnesandnoble.com/include/terms_of_use.asp
A webpage giving information about how to contact their customer service. It looks like there is no phone number, but there is chat (unavailable right now because of the lateness of the hour):
http://www.barnesandnoble.com/customerservice/contactus
I'll try to see if I can't dig up a customer service phone number for them somewhere. Does anyone happen to have one?