I have lost 2.2 bitcoin

i was trying to buy 2 devices on Alibaba.com to mine Siacoin,from these emails holder:
exportsiegristltd@gmail.com ,
jessica.chan@authenmole.cn.
after multiple payments the reseller never have sent the goods.i have paid multiple times. on this web site Im going to reveal the all information i have on them.

Who robbed me ???