UK Galaxy S3 i9300 on 4.3 rooted (today) none of the unlock methods seem to work

Hi all,
I'm a noob.
I've swapped screens and rooted several phones but only under your instruction. I have no skills.
I rooted my old S3 today (now living in Spain) but cannot find a solution to unlock it from Orange/ EE (UK)
If I have to pay, I have to pay, but I like reading and finding how you guys solve the problems and then trying it out so I joined up and now I'm reaching out for help.

Thanks in advance