A7x

Having got into my AX at work to drive home the key wouldn't turn. It felt like the steering lock was still engaged but after much waggling it still didn't release. I got a tow to our local garage and they seemed to think it was something to do with the key being to worn but it still opens the doors so I'm not sure about that. Turns out regardless of the ignition they key is too worn to repair at a locksmith. What do you all think? Is it my steering lock or ignition or key and how would I go about solving any of those. Many thanks.