We used a pick up service that worked well for us. Will try to locate info for you.
Tel 00 34 67862104
I can't remember the name but the albergues and hotels where we stayed all seemed to know them. Plus albergues and hotels will know transfer companies.
This company wouldn't transport from Lires to Santiago so we made other arrangements. Bags to a Muxia address then we caught the bus back to Santiago.