Move to Greece from UK

I have now purchased a piece of land and a shell of a house and want to take advantage of being able to bring in a container and a car free of import duty. How and where do i go about doing this? I tried the Greek embassy on Friday at 12 midday to get an appointment as they suggest and frustratingly you cant get an appointment for this topic so i wasn't sure where to go next? Any ideas gratefully received.


I also am thinking about buying a prefab house any suggestions as to where i should look for this please?

Thanks so much to anybody replying.