UGH! I am so sorry this happened to you!
First of all, she should have been honest with you from the GET if she didn't want to go.
I cannot stand dishonest people.
You offering to pay for her, then her turning around and AVOIDING you for no apparent reason speaks absolute volumes about her!
She is the selfish one in this case because how on earth does she expect YOU to spend every single moment with HER on YOUR wedding? I'm sorry, but that is ridiculous!
I wouldn't call her. At all. Since she's acting like you owe her something. That's just me, though. Don't give her the satisfaction.
It's a blessing that she showed her true colors BEFORE the wedding because when all is said in done, this remains:
YOU are getting married, the wedding WILL go on, and you are going to have a freakin' blast!
Without her!
Aw yeah!
Sometimes breaking up is hard to do but necessary!