Timeshare Vacation Internationale Resorts. review: Complaint

My complaint is for years I've been going to the Oasis in Palm Springs California during Labor Day weekend for years with no problem. But it seems the Oasis found space for me because there was potential for them to get a bigger contract from me which of course means more money. Once I signed the bigger contract and they double the assessment fees without telling me, they now aren't interested in finding space for me at the Oasis resort. I talked to a previous employee of the Oasis years ago and she told me that they reserve a high percentage of their units for potential customers instead of allowing present customers to have a unit. I signed a new contract and I'm not getting what I paid for so I'm going to quit making payments until I'm satisfied that they're giving me the service I signed up for. I think that's fair because I'm tired of businesses like Vacation Internationale taking advantage of their customer.