New Firmware update for 2020 Berlingo Van!

[5EAN]

it was Evans halshaw citreon Leeds (1.5 diesel Enterprise model late 69 plate ) when i was paying for the vehicle i downloaded app in showroom then showed them the update i was told yes yes we will do it took it back on Friday last week thats when all of the cock and bull came out from them about it doesn't need it etc i came away without it been updated they kept my memory stick and said they would call me when they have sorted it still waiting. i have had a go downloading it myself with my very hold windows laptop not a problem the problem is i cant put it onto the usb stick i can put the licence one on but its asking me to unzip it and says my 32GB stick not big enough? thats the bit i cant do its over my head i don't know that much about computers etc. would they be anywhere i could go for them to put it onto the stick for me?i wish now that i wouldn't have brought it away from showroom until it was done.