My brother in law booked a UK holiday which we have paid into, with my kids and my partners grandparents. We've had a bit of a fall out a week before the holiday and he has said we either buy him out of the holiday or they buy us out. Now, I'd go on the holiday no matter what because of my kids, they desperately want to go and it wouldn't bother me that we've fallen out. But he's controlling the situation and basically just saying they are the only options. I definitely can't afford to buy him out which he knows, so the only option he is giving me is no holiday (the money I got back wouldn't cover a separate holiday). My question is, do I have any say about this? I don't have contact details to be able to get into the holiday house. The brother in law has all the info so I can't get in unless he gives us the key code. We want to go on holiday but now can't.