it should never been sent back to bitmain after it left there warehose . Dhl should not reversed it. Unless the address was unconfirmed because of a lame delivery driver to lazy to read . This sounds like u should be compensated . Since they recieved there items then u should get them to send u another one or some type of reimbursement for this . What does the account say in bitmain
Thats why I always confirm my address double and triple check on everything on ebay all my accounts and you get those where they ship and billing address I always have my bank have my billing address updated always. This looks like you need to be sure u have your address confirmed with a billing bank like visa . This removes this risk of loosing 10k damn good one . They must be laughin in china now about how they get all these free btc in these forums scamming ppl . Send btc to this address lol to them in china .