Take a deep breath and maybe ask the sellers if you can get in and do some of the things you wanted to do, Paint? Hang curtains? Since it isn't a new house, maybe you can negotiate and probably the other folks have vacated.....just thinking how you can make this better. Hmmm since you dealt with people who break in I bet you know how. It is your house anyway....
In the end, it is will be o.k. It will be all settled in no time. I can see how you have had this all planned and it is a real BIG mess up. I agree with whoever said that THE BIG GUYS are involved now and everything is being done that can be done.
I feel bad that this is the beginning of your life here. Feel this hug.