If you are going to have to pay it off anyways, you are better off making lemonaid then giving back the lemons. Sure OLCC will take it back and sell it again to someone else, but you will never get any value out of it, just all the cost.
Every timeshare has to be sold by the developer in order for it to be out in the resale market. Best advice is learn what you have, use it, buy resale to extended it, but only after you do your research first.
Sorry harsh lesson, but that is the reality of it.