Yours is not a question for lawyers.................

These are all matters that will be resolved in your divorce. This is not a DIY project.

None of us is a judge. Their story is likely different than yours. If you don't return it, they can sue you, post bad reviews, etc. If you are...

Not all discrimination is illegal. Discrimination based on content is likely legal. Discrimination based on race, age, etc. is not.

If you were never damaged you have nothing to sue for. If you have nerve damage see a local injury attorney.

Significant chance he is going to jail if they don't return immediately.

Get a refund. You have no damages to sue for.

Your remedy is to get them to fix the problem, not an expensive, protracted lawsuit.

It appears they did not agree to your "terms."

That is not a question for lawyers. Do some research. Contact the Better Business Bureau.