RE: I bought a Kangoo ZE !!!!!
You appear to be talking about the range estimation on the dash. It is of very little value, IMHO. Forget it. Get used to relating your driving style, and the weather, with how many miles you get for each 'octal' of the SOC meter.
Give it a good charge and drive nicely, see how far you get. You should be getting a comfortable 40 miles on half of a battery at the moment, with no heating.
Did you get one with the winter diesel heater built in? The best option on an EV there could be, IMHO!