Bitmain is indeed reputable... sorry to hear for your loss.
Should you happen to find yourself investing in zcash or other mining at genesis-mining.com, your use of my code Prg9FYoH would be greatly appreciated. I've found them to be a solid and reliable company, with a safe return on investment. I wouldn't be surprised in the least to hear you already have contracts with them. :)
Go Be Awesome!