Xperia Z3 Unlock (on ee but not ee method)

Hi
Just got an xperia z3, never had one before looks like a nice phone to own, after loving a htc one m8..went to an s5 and had issues with all 2 out of 3 i had! So now have a z3..not had a sony phone since the k850i..great phone

Anyway cant really do much with it as its locked to EE currently, and dont really fancy waiting a week for a code from ee,

Ebay does the codes but at 14.39 or something crazy, anyone know a cheaper method to get her unlocked?

Thanks in advance