Bulsat uses the F1 and F2 Beams
_http://www.lyngsat-maps.com/maps/hellas2_f1.html
_http://www.lyngsat-maps.com/maps/hellas2_f2.html
At your location, the Footprints suggest you can get an EIRP of 50 to 52 dBW, which equates to a required Dish size of around 60cm.
Better to go for something around 80cm to ensure stable reception.
You appear to have a 1m Motorised Dish already .................. ???