Apparently loyalty means nothing to some people :/

Go to your boss's supervisor and put in a written complaint. OP you should of gotten the raise and promotion in writing before accepting it, cause now it's their word against yours.

Always get it writing as bosses are full of shit

I would've taken the other job.

Never act on an offer unless it is in writing from either a new or present employer. Once it's in writing if necessary you can sue for breach of contract if they refuse to carry through. However that won't likely be necessary because they know that. This was a hard learning experience.

When will people learn. ALWAYS get it in writing!

next time, ask for a formal offer to think about and don't believe what your ears hear.

That's a lawsuit right there.

If it isn't in writing it never happened

Never do that, now she knows you want more, and will tryto line up a replacement. NEVER TAKE THE OFFER TO STAY. They alwayse get you later.