K.T.
First, keep all your communication regarding custody to emails, so you have a copy with a date stamp. Second, get a good lawyer. I have been using Neil Olsen in Torrance. He is Fantastic! His numb.er is ###-###-####
Third, relax. You did your job and made every effort to communicate with him. He will either have to change his vacation or go without her. If he tries to argue, tell him to take it up with the lawyer. You gave him plenty of time to co-ordinate plans. The onus is on him.
By staying firm and remaining calm you will defuse his control games and hopefully provide comfort and stability for your daughter.
My son has been doing a lot better since I quit letting my ex boss me around. And frankly, my ex is calmer too, because he knows that is the only way he will get anything.