I shipped my rental back to the "marketplace rentals" division of Valore books over 2 weeks ago and have not received confirmation that it has been successfully received. I have contacted the seller "directly" three times by the only means possible on the Valore website and have yet to hear back from them. I also contacted Valore books customer support and have not heard back. Today I called a Valore books representative and he said if my book is not there in 7 days they will charge an extension AND a late fee. What am I supposed to do about the book being EXTREMELY late if it has been out of my hands for almost 2 weeks now. This has been the worst textbook rental experience I have ever had.