Hi Candyfloss,
I own in Playa Flamenca, up the coast from Mar Menor, but if it helps, the ariel the builder puts up will normally only pick up Spanish TV.
Sometimes the builder also installs cable, but you will know that as you will have cable sockets next to your ariel sockets in your property. If cable is installed, it may take a few years for cable to be switched on in your block as it did ours.
So, we had to have a mesh ariel installed to pick up English TV and got together in a group of 4+ owners to share the installation cost and only our TV's could access the signal for a monthly charge.
This was initially done by a company called Nortons, but when TV went digital, Nortons switched us to Cina, who then installed a digi box, still using the mesh ariel I think? We pay 17€ per month and have all the Enlgish channels, plus movies, sports, etc., etc., Such a bargain compared to UK prices eh?!
I hope this helps, maybe Cina operate in your area, as we are only about 40 mins drive from you.
Kind regards,