White-trash stole my solo!

So last night, I had two things going on at once: I had to sing the national anthem for a Green Bay Deacons hockey game, and I had to work.
First things first, a few weeks ago I was contacted to sing the national anthem for a Green Bay Deacons hockey game. They had gotten my name from the Green Bay Gamblers who I normally sing for. I asked off, and it was not given to me.
I stopped in the day before to find someone to cover for me, but alas, I failed.
So at work last night I told my boss I would have to leave at 7, so I could be there at 7:15 and sing at 7:30, I also told him I would be back around 7:45 or as soon as I could get back. He was upset about this, and told me I had to think about if this was really the part time job for me. I said that singing is what I do, and recently my name has been thrown around green bay. I am getting calls from the Bullfrogs, Deacons, and Gamblers. I assured him this wouldn't happen again.
So at 7 I leave to go to the DePere Ice Arena, a wee bit flustered from the converstaion with my boss. I get there and the lady that was helping was like "Oh! Ok, I will walk you down there when it's time" So we walk down to the place where the microphone is, and I meet the guys who are doing the technical stuff, and he asks me for my name so he can annouce it in like 5 minutes when they start.

All of a sudden this woman, dressed in Harley Davidson, holding a beer (we'll call her White-trash), comes up and goes "Ok I'm ready to sing"
Lady next to me: "Oh, you don't have to they brought in someone to tonight"
White-trash: "WHAT? It's my husbands last game! He's been playing for 15 years and it's his last game and my kids are here, I NEED to sing. Who are you?"
Me: "I was contacted a few weeks ago, they came to me and asked me to sing tonight, I usually sing for the gamblers"
White-trash: "Well honey you can sing for every game next year but I need to sing for this one, its my husbands last game and I have family here"
Me: "I have family here too, and I got in trouble at work to be here." *in my head I'm thinking, I could outsing you anyday*
White-trash: *who is now talking to the players* "Where is Carl? I need to talk to him, this girl thinks she is singing and now she's getting all pissed"
(this whole time no one has stepped in to say that I was scheduled to sing)
Me: "Whatever" and I left.

I was so pissed, I have never been treated that bad. You ask to come sing for you then you don't even stand up for me when some white-trash, drunk, pitchless bitch comes to take it away????

I got back to work and my boss could see I was upset, so he felt kinda bad and sympathized.

I've never been so disrespected or humiliated in my life.

Green Bay Deacons: don't expect me to answer your calls, don't expect me to ever come to a game either.