Lexi, it seems you are experiencing one of the bitter truths of the workplace, namely that most organisations find it easier to get rid of the victim than deal with the bully.
You need to be in a trade union or have some organisation to advise you in your position.
Irrespective of whether your employer recognises a union or not, they are in a position to give you support and advice.
They sound a horrible bunch of so and so's. It might be worth looking around for other openings.