Bring snacks or lunch if collecting a lease vehicle. Be prepared to wait upwards of an hour despite pre-booking a pickup time as we are at this very moment. Shambolic.
Don't. Just don't. Once your name is on the dotted line, expect them to wash their hands of you. Find another retailer, avoid Arnold Clark.
Returning a car for repairs due to their poor selling? Don't pay the insurance charge or accept a car smaller than the one they're "fixing". You'll probably have to go via their CEO at head office.