You place a whole argument around not having the CCTV/whatever.
It's the only proof you will have of the incident occurring.
I give you a way to possibly get the footage, so give you a way to possibly get compensation.
"it's not worth the effort"
What's wrong with you?

For a start you're already losing because you didn't report it on the day. I feel sorry for whoever has to click to send these generic letters out to people who don't play by the rules.