[Q] Factory Reset and no rom installed. Help topic

Hey guys!

So i was installing a new rom and i didnt create no backup and i decided to go into recovery and reset everything, therefore deleting the previous rom with it. After i realize i didnt have my new rom saved either for me to install it, Now im stuck with recovery and can't even connect to my computer so i could transfer my new rom.

What are my options to revive my tablet? I really want to play piano on it.

Thanks!!