[Daring Scylla]

That's really awful and i hate it when family is overbearing and demanding.
I don't think there's a lot i can tell you to do - you're stubborn ( i don't mean this as a bad thing ) and you laid out your issues against your aunt and cousin. Your aunt had no right to demand a gift or take your stuff, since you don't get on well with them. But there's not a lot you can do.
I refused to see any of my family this christmas with the exception of my brother because the last time I saw any of my aunts or uncles we all had a big row and now things are uncomfortable. I think from now on you may just want to avoid seeing them, like I do.
Sorry to hear your christmas wasn't spectacular, hope it's better next year, mate.