Twisted Frame Failures Travel Trailers

Hello, I purchased a new 2012 Fun Finder Extra 27' Toy Hauler out of Logan UT (RockyMT RV, Cruiser RV) on Jan. 2013. It had some problems that night which they said they fixed and anythiing else they said was covered under warranty in Las Vegas. By the time I got home we had lots of issues with twisting and frame failures. It has been to three dealerships/repair shops. The first one made some repairs but the problems just returned. The second two refused to touch the trailer confirming frame and twisting issues with on giving an est. of $22,000 to fix. Problems have included ceiling cabinets pulling away from the ceiling, Center wall buckling and separating from the floor, doors and windows not opening and closing correctly, the floor and ceiling trim seperates from the floor and ceiling, the floor buckles and creakes when walked on it and sewer pipes leak to name just a few. The dealers out here say the trailer is not safe and that it needs to be returned to the manufacture and replaced. It has been back to the factory with the problems not fix or that it has continued to twist so much on the drive returning home that the issues have returned or broken again. So for over a year it has been at three dealers and at the factory with me not being able to use it. Has anyone eles had these problems. This is a Lippert Frame. I know there has been a lot of 5th wheel issues but not much reported on TT. Lippert has come out and added 4 additional support beams but it has not fixed the problem. Tks