If you are unhappy with the range on the vehicle then we would suggest returning it to the dealer and getting your old car back, but it is important to remember that the range indication is a calculation based on both the battery's state of charge but also the recent rate of energy consumption, in the same way that the remaining range display on a petrol or diesel car operates. Driving in town with lots of stopping and starting increases consumption and will reduce the range more quickly, whereas steady cruising at sensible speeds will reduce the rate of consumption and should see the remaining range reduce more slowly. The ambient temperature will also have an effect on range and charging times.