I finally can end this nightmare for the experience with BA...
I got my refunds by BTC the amount I paid for my order last year. yes,in my heart it's not fair,but some better than none...

I will never do preorder anymore,mining is the lessness and meaningless work in the world...
（I have to say,it's shame that I still ming...I think I will end mining when my miner can't mine any more because of the high diff..even that I can never got my money back and make any profit with the miner.）
good luck everyone! hope all you can got want you want..
for the customers here,I want to say,we all are victims...we are cheated by this bitcoin game..wake up !!!
go for your work , go for your friends and family ...forget about bitcoin if you can got out of this stuff like me now...

anyone need help or infos can contact me anyway..
regards