This is rough man, I’m really sorry to hear all that. Christmas is supposed to be a happy time for everyone even without all the gifts.

Maybe instead of gifts for your kids like physical things, plan a day with just you and them. Do something fun as a family or with each of them individually. Memories like that they can cherish for a long time after this year and gifts dont have to be material.

Given what you said, it sounds like you could use a day of fun with them.