Well depending on your credit company you may be able to go through them for a double charge. Visa Mastercard and my Fav Amex will back you 100%. Some bankcards will even help.

Tell them the situation, tell them you need a solution to the problem,
and Ta Da.

Working in a Customer Service field myself and dealing with Complaints I'm really floored that they'd take that stance.

Do like I do, be nice, throw them some Honey, and say in a flu flu bunney Voice.

Let. Me. Speak. To. Your. Supervisor.
Just keep going that route till you hit the 12 year kid who made Zmud in the first place...