On the North Coast there is Wilson, who I am sure is still in business, and you were recommended Delio...so try one of them....Another option is
Welcome To Paradise Transportation
They are based in Santiago, but they do tons of airport pickups and deliveries as well as people moving around the entire country....and reports on thir service have been outstanding...
So you have at least three options...(Yeah, I didn't give you /wilson's number--I don't have it, but if you do a search on Wilson and taxi you will doubtless come up with it..)
HB