If you weren't actually able to complete the homework or practice tests during the class, then basically do the course again (watching the taped classes in place of the live classes) - just like you were supposed to do it the first time around. That'll take about 9 weeks. You have access to the online materials for 3 months from the last day of class, so you may need to extend your access a little bit - contact the office if that turns out to be the case (800.576.GMAT or
studentservices@manhattangmat.com). There is a small fee to extend access, but I don't know what it is, unfortunately.