Hallo, I bought a used but new to me Skoda Fabia from a main dealer on Wednesday. After 40 miles of driving it had used a quarter of a tank of petrol and the car's computer says it is doing 30mpg. Unfortunately I didn't screen shot the listing, but I know it was advertised at around 50mpg as all the other same models are by that dealer.
After trying to fob me off they have agreed to look at it next week, but I am wondering if I should push for a refund instead. What would you do?