If you stop as Patri above suggested, be prepared also for the possibility of threatening collection calls and letters. Keep in mind that they are just threats, usually without any teeth.
The other suggestion for people in your boat that many here on TUG would give is to not go seeking the "help" of these companies and law firms that claim they can exit/cancel your timeshare or as in your case, membership, having you come out unscathed. Those are usually scams.