Unfortunately if we publish this email 99.99% of emails are support requests or feature requests unrelated to Joplin Cloud, or request to cancel the account (which I don't do over email for security easons), or request to delete the data per GDPR, which we already do automatically.
The best place for contact is the forum as if it's something that's really related to Joplin Cloud (such as this particular request), I can contact the person by PM.
I understand that's sometimes you might want to be in contact with an actual person but we'd have to charge a lot more to provide the level of support that would be needed, and the truth is it's not necessary because you can already get support here or on Discord.