Update if anyone cares: Still did not get my money back from Amazon Payments. RSI replied a couple weeks ago with "Hey, turns out the pledge did go through" but that wasn't really the point. I explained the situation yet again, but have not heard back since and it's been over a month now so I'm kind of just thinking it's a lost cause. But hey, having two copies of the game isn't a total loss I guess, though really I'm just disappointed in Amazon Payments' dispute program and lack of communication.
send an e-mail to [email protected] and she should get you taken care of.