Unhappy [Q] Corrupt EFS folder please help.

Unfortunately while flashing a ROM i encountered an error, one of which has essentially corrupted my EFS folder.
This problem has led to an unknown baseband version and the inability to connect to a mobile network.
My phone is a GT-N7105t Samsung galaxy note 2, due to the problems it is now running stock firmware on Jelly Bean 4.3, my phone is of the Telstra model in Australia and i am using a Telstra Sim.
I have managed to exit factory mode but have made no other progress.
Please help I am in desperate need of it!
I will supply any other necessary information as to achieve functionality again.
Sorry if this is in the wrong thread.
Thanks in Advance.