Ask HN: What happens if I like and use a service but can't contact anyone there?

this happens to be a paid service. Actually it's rss.app. I've tried over the past 3-4 months to get in contact with them via email and Twitter, and it's failed. I have some questions for them, along with some ideas to pass along. I really do like the service, it works really well for me, however I'm annoyed by the lack of responses. I usually find that services that do this kind of thing go away quickly, but I don't think that's going to happen with this one. Anyway, does anyone know how I can get in contact with them? thanks!