I feel like I don't want to go home for Christmas and cancel last minute
That sounds sad. Why aren't you going to go home for Christmas?
I'm too old to get more presents.
You really shouldn't abandon your family during the holidays. You should be there for them. Cancelling last minute is rude, too.
I don't want to go home, I will say I am unwell or something.
If that's the case, you are so lucky. Presents are just a symbolic way of showing love and care, and you are saying you want to avoid love and care? I would rather be in your shoes and receive lots of presents until I die, so you might want to reconsider and go home to celebrate Christmas.