You asked about markets too & I see no one has touched on these. You're in Almoradi, which has a brilliant Saturday market .. I know as I go each Saturday we're over in Guardamar.
However, you want markets on Sundays so here are three, not far from you.
Zoco market is by the roundabout over the AP7 by the Masa concrete works. Coming from Almoradi you'd come off the AP7 at jct 745
Campo de Guardamar market, commonly called lemon tree market, is off the CV895, commonly called lemon tree road, next to the El Raso urb. MASSIVE market with over 50 cafes too. (Best market in my opinion).
A new one at Dolores has recently opened but I've only heard about it from a friend who lives there, I think it's small.