Facturo creates no account: there is no ElpisIA account to delete. Your data is on your devices and in your private iCloud.
Deleting your data
- Export it first if you must keep it: Entreprise › Exporter tout.
- Delete the Facturo app on each device.
- In iCloud: Settings › your name › iCloud › Manage Account Storage › Facturo › Delete Data.
Questions: contact form.