You do not have time to waste for an appeal, which after all your employer decided to end your employment according to the terms of the contract which you signed.

I went through this, it was middle of school year. It take about 3 months to switch RPs if you have an offer in your hands NOW.

If you do not have an offer or you know the possibilities are slim, start packing and move on.

Remember, a door open when a door close, and this could be the best thing happened to you when you look back in a year or two.