I now have two keys that work but neither do the same job! Original key will lock/unlock doors, spare key works in ignition

Spare key is tempermental about lock/unlock.
Spoke to local stealer, whose mechanic , when asked should I bring her in for resynch, said and I quote "yeah resynch is difficult, don't know if I remember how to do it". I then asked how much for a new key............
£147 and some pennies!!!

I told them I would manage until absolutely necessary as it was ludicrous to ask £147 plus for a key for a 15yr old car. Even although I get discount I'm reckoning it would still be over the ton.
Next time I'm over that way I'll pop in and see them, see if they can say that price with a straight face. Also see if their mechanic can 'remember' what he's paid for.