I booked an electric car (Tesla 3) for 3 days but booked it for 12 hrs later than actual pickup, my error. Hertz tried to make me pay for upgrade petrol 4 x4 car for extra GBP70/day....but after discussing to cancel and walk next door to Europcar, they suddenly found an electric vehicle (Polestar 2) available! Only needed to pay the 1 day extra