Check vehicles before driving off & document everything

I was moving from London to Glasgow and needed a car. I picked up from Enterprise and we checked the vehicle. Thankfully I documented a scuff on the side door of the van I used to move to Glasgow which wasn't big enough to be classed as "damage". The person checking with me wasn't going to document it at all. No problem, took a photo. Didn't think more of it. I was also told it was also fine to add an extra driver at another branch - just had to pay for the extra days of an additional driver. Got to Leeds and they wanted to take an additional £200 deposit off me to add another driver on top of the £200 deposit I'd already paid for the hire. I got that waived because I knew the names of the people I'd spoken to who didn't inform me of this. Got to Glasgow, dropped the van off. Signed a document confirming I was dropping the van off in the same state I picked it up in. Apparently this document counts for nothing because I got a phone call 2 days later saying I was being charged for damage to the side door. I missed the call and checked my voicemail informing me of this and they'd taken the money off me before confirming anything with me. Thankfully got that refunded (plus a bit extra as a sorry) because I had proof that it wasn't classed as damage when I picked it up. Now nearly 2 months later I get a letter charging me £250 for the damage which wasn't ever damage in the first place and had been agreed it wasn't ever damage. Thankfully I knew who I'd spoken to to get the refund and have got it waived for the second time. The cost breakdown in the letter didn't even come to £250 but they wanted to charge me that anyway because it's the maximum they could because I reduced my excess to exactly that. Lesson: document all scuffs to the hire vehicle, even if they don't call it damage in the first place or it'll cost you hundreds of pounds. Take names of everyone you speak to. Or just don't use Enterprise.