Hi,
The best thing to do would be to email us your name, the name and edition of the book you purchased, and the code to
studentservices@manhattangmat.com. We can then look up the code and see if it is in our system. If the book was already used, then the code will no longer work. If there is another issue, we can work with you to solve it once we can look up the code. You may also want to give us a call at 212 721 7400 or toll free via skype by calling m.gmat .
Best Wishes,
Caitlin Clay
Student Services Associate