Oxford won't cover Vimpat

Does anyone have any experience with drug issues and Oxford? I can't afford these damn Obama plans much longer. My employer has health and the plans are fine except they won't cover Vimpat. Hasn't been on their list consistently, for as long as I can remember in NY/NJ. It's on their Connecticut lists but that's doesn't help me unfortunately. Oxford won't even discuss the issue with my or my company until I'm a member, and at that point I'm between a rock and a hard place. Vimpat is about 10.5K for 3 months at my dose and that was the price I found on discount cards. After Tegretol stopped working it took alot of drugs and combinations and a year or more of trying to find this. And I'm not willing to start playing with alternatives to make the insurance companies to save Oxford money if I have to switch to them. Any advice is appreciated. Thanks, Kenny