Any question answered...

I know absolute squat about mobile phones/blackberry's and need to get one unlocked.

I have a blackberry Z10 I need to use but cant with the sim I have.

can the provider do it? currently only for O2 simcards and I need it to work for a Vodafone ES compatible card.

or does it need to be done in a shop?

You should be able to locate a corner shop or market stall holder who sells mobile phone covers and the like who will be able to unlock your phone for use with any sim.