That is up to the rules of the prison. Some prohibit it.

Of course it's legal. And entirely proper.............

This is not grounds for a lawsuit..................................

Your post is void of punctuation and makes no sense. Maybe try again.

Return it for a refund..............................

Glad you got a refund. That is what you are entitled to.

If there are unpaid fees it hasn't been paid off........

Were you an employee? Not clear. If so, an employment lawyer.

You are already married......................................................

You can refuse. They can fire you. You can quit.