Don't know about Consum today.
Eroski at Dos Mares at San Pedro del Pinatar (5 mins from San Javier airport) and Carrefour at Espacio Mediterraneo, Cartagena will be open today as both centres open 364 days a year now.
The resort's Spa also open today 10am to 2:30pm and should be open tomorrow as well. Stock and prices a little better than they were a couple of years ago.