How to get rid of Timeshare?

My Husband and I purchased with Wyndam Resorts back in 1999. We went on 12 different vacations across the states both east and west coast. Enjoyed all of them. Now we have been trying to get rid of them. We tried a realitor, paid a fee, never heard from them again. Then we contacted Timeshare Rescue and started the ball rolling in Aug 2008. Up to this point, we,ve gotten one out of our name, one hanging in limbo and the last one still in our name before the Rescue filed bankruptcy. We need help please. Wyndam is still trying to get fees from us . Will this kill our good credit