Surely your Zoe doesn't need an air-con recharge yet?
I think that technicians are frightened to do anything to an electric car. Someone on the My Zoe forum had an accident which damaged the bumper and light; the technicians wouldn't touch it until the 'electricity was turned off', which it appears was no simple matter.
I wouldn't recommend Kwik-fit.
AirCon and heat pumps are closed systems. They do not need recharging unless there is a leak. I'd take the car to a specialist. If it is in warranty, I'd take it to a dealer.
What should happen is leak detection, leak repair, pump out all the air with a vacuum pump and then recharge.
I doubt they Kwik-Fit would be familiar with heat pumps. It is possible that Zoe needs a service computer to set the valves to the correct position for a re-fil. I know with some of the Renaults, many repairs require a HV disconnect.