`->` They had their luggage carried by the porter.
S + had/hadn't + O + V-pp`2` + by + S.
`->` I had them carry suitcases to a taxi.
S + had/hadn't + V-inf + O.
`->` I got suitcases for them to carry to a taxi.
S+ V-ed + O + Preposition + S + to + V.
$#Kemi$