Hi all, for those who need some automotive assistance to return from a walk to La Marina, here is some information on the buses..!
The bus/coach company avanza (AKA Costa Azul) runs a bus from Alicante to Pilar de la Horadada & back which goes via Santa Pola and La Marina old village (not the urb:).
Attached is an example image of the timetable for a weekday this week but full info can be obtained easily from their web page and the link is below to the page for searching departure and destination and time ranges. It's easy to use, just type in your requirements into the boxes and it will come up with the times.
https://costazul.net/lineas-interurbanas/