Thank you all for the comments. The reason I posted was to ensure I wasn't being unreasonable in being annoyed by it, I wasn't sure if I was going to get 'plans change don't be silly.' I think this is down to the twisting of things by others to me.
I am annoyed, I am upset. DD has changed her work schedule, I had managed to persuade DS off fortnight, DD had made a card and the baby had no idea who these people are - but we were looking forward to it.
I hate drama, and actively avoid it. If I block on FB I'll get lots of messages 'why have you done that?' Quite frankly can't be bothered with it, I rarely go on there anymore- possibly why BIL posted, or maybe just DF and sis were in cahoots and he knew nothing. Don't care to be honest. I have deactivated my FB account. Many of you are right I don't want or need to see it as it has caused hurt and upset to me and the children.
When / if DF calls or emails next I will put on my big girl pants and say as has been suggested 'don't lie to me again, that was hurtful and cruel.' I shall not make a fuss. I won't bother seeing him next weekend if he suggests it.
I have my lovely family, and the only ones missing out is Sis, BIL and DF, because they clearly don't want to be part of their lives. Good luck to them.
And DF is not getting DD card, he doesn't deserve her hard work frankly!