False advertising

I bought a Vehicle/ Car at We buy cars at the DOME last Month. The Car was advertised as a Renault Megane 1.2 GTline 2017 Model both on the Website and on the floor at we Buy cars the Dome Branch. At Renault I was informed that the Vehicle was NOT a 2017 Model, the vehicle was actually registered with Renault in 2015. Which means the Vehicle was a year model before 2015. We all know that the facts at play when one is buying a Vehicle are (Year Model, Mileage, Physical conditions, and Mechanical conditions) and I had considered these facts too, hence I had arrived at a decision to purchase the Vehicle in question.