For all you shopaholics there is a new shopping mall in San Javier - Centro Comercial Dos Mares just a 10 minute drive from the Playa Marina apartment.
Another fantastic commercial centre with Designer Shops, Ten-Pin Bowling, Cinemas, Pizzerias etc. etc... is The Habaneras Centro Comercial, it's also just 10 minutes away in Torrevieja, and for even more serious retail therapy, Alicante, Murcia - Nueva Condomina and Elche are all less than an hour's drive away.
There are several weekly street markets around, various gift shops and large supermarkets (Mercadona, Aldi, Lidl) all in the immediate area.
If you fancy taking an early evening trip to Torrevieja you can test your bartering skills at the Hippy Street Market. Next door to that and for the kids is the nightly Funfair! You can then sample one of the fine restaurants the harbour of Torrevieja before returning back to Cabo Roig for last orders!