Does seem a bit rubbish to be honest.
As above. How do you crack the seat tube and not damage the post?
I’d be really annoyed that they were sending ‘evidence’ of wear, but not even sending the right pics….
Have you actually spoken to someone about it, or is it just e-mail correspondence. I’d try and get on the blower to someone about it. Make a list of your concerns/questions so you don’t forget to mention anything. You’ll get further with a 10 min phone call that you will with a week of e-mails back & forth.
Fact is you probably shouldn’t have ridden the bike, but regardless of that there is clearly some damage there.
Did you pay with credit card? If so, I’d be getting in touch with them and getting them to try & sort it….