Hi
welcome to the forum
The simplest form of the address is
La Reserva de Marbella
Manzana 4, Blq1, **** (apt no)
29604 Marbella
Malaga
Spain
do not add Cabopino or Las Chapas to the address
The office dealing with RDM is in Elveria, to collect parcels or uneliverable mail
Hope this helps
John