gadgetbargain.myshopify.com gadgetsensation@outlook.com Total Ripoff. Took my money and product not received nor can I get in touch with them

On 12/13/15 I placed on order for 2 hoverboards.  The website was listed in Amazon under sponsored sites so I thought it was safe.  I paid 199.99 for the items but soon realized that this might be a scam so I tried to contact them to cancel the order.  Their website has a "contact us" where you put your name, email and question.  I did this several times but no response.  They did send me an order confirmation stating that all items in order 1102 have been shipped but no tracking number.  I responded to their email but they did not respond.  Now they have my money and I have no product.  I am usually very careful but since it was on Amazon as a sponsored site I thought it was good