That is total crap. Authentic Kanger products come in a Kanger slide boxes and have certificates of authenticity in the box. They also come with extra coils. I would immediately contact the offending vendor and demand a refund and a return.
There is a sub forum here for vendor complaints however, I have not had to use it so I would check the rules before posting.
In my opinion, vendors who advertise one thing and send another should be outed and booted from being a supported vendor.
For the price you paid, genuine can be had and that's what you should of received.
Good luck and don't let this supplier get away with this.
Please PM me the link for future reference..............Thanks