Moto G 2015 5.1 Lockscreen Bypass?

I Bought from OLX Moto G3 16 GB lollipop 5.1, the mobile got locked i forgot the lock pattern, than I hard format it the phone got started but now it is asking for the same Email Id which was synced previously

But i also forget the Email Id which was logged in It.....

Now again and again I m trying but noting happening,

So how to solve this problem as my phone is useless now

Plz plz plz help:(

phone says "This device was reset. To continue, sign in with a Google Account that was previously synced on this device."

plz help any one I am very tensed

I will not be able to contact that person from whom i bought this phone, his number is switched off

So plz tell me the final solution fr this will I be able to Unlock it or Not