But this is an online discussion forum. And you posed a question. People are free to respond.
You’ve decided you’re offended and not going to return to them again. Fine. It’s your choice. It’s not what lots of people would do. And that’s fine too. This is a discussion that you’ve started about if they were right to charge, and of course people discuss the circumstances of you not going to the appointment and also how you are dealing with it.
Are you someone who doesn’t like discussing things and who would find a conversation about them charging you really difficult? Is it that above all, you want to avoid that? I know some people would feel like that. They will sacrifice the £30 (which you say you will do …you won’t raise the charge) and say nothing, but inwardly be really cross.
Will you ring or email to ask them to remove your card from their database?
If they then ask you why you want to do that, will you then tell them? What if it turns out they didn’t get your message or are happy to rebook you or refund you? Will you then reconsider? Is it that you want them to come to you about it, or is it that it’s annoyed you so much that nothing is going to change your mind and you’re never going to set foot in there again. Again, I know some people do react like this to things that annoy them…they decide they will back-off and nothing will change their mind.
To be honest, the fact that you are taking offence and getting irritated with posters on this thread, suggests you aren’t all that tolerant or able to accept differing views to your own. Yes, you had a medical emergency (and we are all really glad you’re okay) but there is also the other side to this, of someone losing out on part of their livelihood and the fact that even if you don’t do this regularly and have genuine reasons, it happens frequently and often people so t have good reasons. You seem to struggle to see it from their point of view too. Most people can see 2 sides to a story. Things are nuanced. There often isn’t a straight forward right and wrong.