Did you make a report to your bank? I wouldn't leave the money with Juan if your not getting a product from him. I'm trying a different distributor for my s3+ and hoping a bitcoin spike won't occur until after I've got my machines.
I just hope if your miner dies in the next 30 days the person you bought from amazon has some skill to fix it.
It was an attempted credit card purchase (as per original Juan provided instructions) -- required he OK the transaction but he chose to simply ignore it. The seller was a miner who was selling off a rack full of supposedly not o/c'd S3s (at least 16 units). Don't know if he was getting out of the game or switching to S3+, though I don't really see much advantage in that, only a slight increase in productivity and efficiency at the cost of a month's mining.
The S3 is in great condition and came up perfectly (no issues outside of my first timer learning curve, all ASICs good, 441KH/s, HWcalc gives .0015%), I'm not o/c'ing either (don't even know how to access the clock yet). To lose a month of mining for the sake of the S3+ seems much more a loss than a gain. Because of that month, I'm tempted to see if I can find another stash of used S3s at a reasonable price, perhaps a better plan than just waiting. I see a few S3s plus a lot of S3+ pre-orders have shown up on Ebay -- many S3+ have great prices but are also indicating possible long handling times, wonder if they're being used to mine for a few weeks before forwarding? I'm new to all this!