Allied Universal / Aus.com review: fired for no reason

So I apply with the company, they offer me a position for grave yard shift. I go and get my tb test, blood work done, a n-95 etc. next day after all that they ask me to go to train with the supervisor at the site so I can start this weekend. So of course I go and turns out nothing has even been approved yet as far as my blood goes so HR themselves call me in and tell me exactly why they would send me, I said I had no idea, Friday comes and they asked me to go back to the hospital to get my badge, so once again I go and receive my badge, I asked them if I work the following day or not and they proceeded to tell me she's not sure, that she will call me back for that as soon as possible. I never received anything back, keep in mind my shift is 10:00pm - 6:00 am. I receive a call Saturday night at 10:20 saying where am I, that I'm supposed to be working, I was in Los Angeles being the fact no one ever called me back I figured I didn't work, so I told them that and they proceeded to text me saying "this is unacceptable" that "if your out of town plans are worth more then your employment, then turn in your uniform". I proceed to text back and say "you Guys never called me back, how is it my fault". They then proceeded to say "bring the uniform in, you've been removed". Great way to cover your self don't you think.