So you did all of your GMAT preparation, maybe even took a GMAT course, and finally took the exam. Then at the GMAT testing center something got messed up. If so, this article is for you. You would think that it would be easy to file a complaint, but it turns out that there a couple things that you should know that aren't stated upfront on the GMAC website.
First of all, you need to e-mail or call them within 30 days of taking the exam. If you wait longer than this, you might as well not even bother getting in touch with them.