I have the same problem and this is what they said.
We would like to inform you that the Nougat 7,0 version of the Android operating system, has been released by LG Electronics Hellas. However, each device is supported with localized firmware and OS updates by the respective LG branch of the country it was imported from.
If a device is not officially imported by LG Electronics Hellas, it wiil only have access to the localized updates of the country of its' origin, through the LG Mobile Support Tool software available in our website (LG Αποτελέσματα αναζήτησης | LG Greece).
For any further queries, please call LGE on 801 11 200 900 or 210 4800654, Monday to Sunday.