this is a scum company who faking themselves as Google. they will tell you lies on the phone that they are from Google Maps.
and they will ask you whether you received a ""Post card" and if all works well for you.
than they will tell you lies, like: we gonna put you in the 7th place in Google. or in the Google Map in your located area.

the number is from a free line 2035984898. and can always be change.
so be careful.