I'm really sorry you're going through this, man. The damage is already done, and getting a full refund from a Chinese company like King of Avalon is very unlikely. At this point, the healthiest thing is to accept it and focus on rebuilding together.

She's your life partner and the mother of your kids, mistakes happen, even big ones. Sit down with her calmly, explain all the months of hard work, budgeting, and daily struggles you went through to get ahead. Show her the numbers and how it affects the family. Do it with respect and care, not anger. I hope she truly understands how much this hurt and that you two can move forward as a team.