Get your taxes done using TurboTax

I imagine that if you haven't actually filed yet (but have paid) and you paid with a credit card, the easiest thing to do is to file a dispute with your credit card company, for non-receipt of service.  Then repeat the process with the free option. (I always find that it's a nightmare to try to undo a payment, so the easiest thing is always to go through the credit card company.)