Open Support in Vehal Settings. This page stays in the app. Vehal does not run a cloud account and does not list a personal inbox.
Vehal can explain Take Photo, Choose from Photos, Save to Photos, Dictate, free preview versus spending 1 Note on an archive card, Demo pages, Log Out (files stay), and Delete Account (records, media, Demo history, and remaining Notes are wiped).
Notes packs are sold through Apple In-App Purchase. For billing questions that Apple handles, use your Apple ID purchase history. Remaining Notes stay on this device and are not restored after Delete Account or after you remove the app.