I’ve got a petrol Citroën C4 but I remember reading awhile back a DS3 Etense (same as the e208) customer was only getting 100 miles out of a full charge she got frustrated with it in the end as garage couldn’t seem to find the problem Motability let her change the car early, basically what they are offering you.
Thing is Motability won’t really care because used cars are going for strong money at the moment so they will do well out of it and when the new owner finds out the problem like your having it won’t be Motability problem by then either.
I would be annoyed if I was in your shoes though.
Current Car 25 Citroën C5 Aircross 1.5BlueHDi 130 EAT8 Max Edition
Previous Cars
05 C3 Exclusive 1.6 110 SensoDrive
08 C2 VTR 1.6 110 SensoDrive
11 C3 Exclusive 1.6 120 Auto
14 C3 Picasso Exclusive 1.6 120 EGS6
19 C4 Cactus Flair 1.2 110 EAT6
21 C4 Shine Plus 1.2 155 EAT8
Citroën Fanatic.