You will find several supermarkets a few minutes from the chalet : 

Spar (5 min) - CHM Shopping Centre. Opening: Monday 08:30–20:00 / Tuesday 08:30–20:00 / Wednesday 08:30–20:00 / Thursday 08:30–20:00 / Friday 08:30–20:00 / Saturday 08:30–20:00 / Sunday 08:30–12:30

Cocci Market (5 min) - CHM Shopping Centre. Opening: Monday 08:30–20:00 / Tuesday 08:30–20:00 / Wednesday 08:30–20:00 / Thursday 08:30–20:00 / Friday 08:30–20:00 / Saturday 08:30–20:00 / Sunday 08:30–12:30

Aldi (10 min) - 5 Av. de l'Europe, 33930 Vendays-Montalivet. Opening: Monday 08:30–20:00 / Tuesday 08:30–20:00 / Wednesday 08:30–20:00 / Thursday 08:30–20:00 / Friday 08:30–20:00 / Saturday 08:30–20:00 / Sunday 08:30–12:30

If you want to access a larger shopping center, you can go to Lesparre city located about 20 minutes drive. This is an E.Leclerc mall.