Fun Bike Center Kami Sports, Fun Bike Center Scammed me out of $7000.00 dongcheng district beijing

I ordered 4 electric bikes from Kami Sports through the alibaba website.  I was quoted $750 per bike plus $170 for shipping to my door.  After I paid the amount requested they supposively shipped the items.  That was back in October.  Since then they have continued to ask for different fees, every time guaranteeing my delivery.  They also claimed there was a mistake when shipping my items and 4 extra bikes were added to the shipment which they made me pay extra fees for as well even though it wasn't my mistake but just their way of being able to get more money out of me. 

The last time I paid the fee they generated a letter stamped with a signature saying this was the last fee required and if they don't follow through they will be suject to legal action.  I paid the fee falling into their scam once again and now they have disappeared even the whatsapp number we had been communicating on has been deleted. 

I created a dispute through alibaba and they found Kami Sports at fault and froze their account so they won't be able to do business or promote their items through alibaba until this gets resolved.  I'm not sure it ever will or that I will ever be able to find them to take legal action.