You can find your Google Play Username and ID in the in-game settings (see the image below)
If you want us to restore also your old inferno levels you have to fill the relative optional box, writing the inferno max reached level (not beaten) for each class separated by commas.
Class order is: war,ass,pal,wiz,nec,sha,ran,dru,eng,bar,pir,run,ward
Example: I’ve reached inferno level 2 with the Warrior and inferno 1 with the Paladin so i will fill the box with 2,0,1,0,0,0,0,0,0,0,0,0,0
We can also restore your hell/void levels. As for the inferno levels you have to write with the same class order separated by commas if you have beaten hell with that class (1) or not (0).
Class order is the same: war,ass,pal,wiz,nec,sha,ran,dru,eng,bar,pir,run,ward
Example: I’ve beaten hell only with Warrior and Paladin so i will fill the box with 1,0,1,0,0,0,0,0,0,0,0,0,0