Note that shops in France are usually closed in the afternoon from 12.30/13.00 until 14.00/15.00, all day on Sunday and in the afternoon on Monday. Supermarkets are an exception, they stay open all day, are open on Sunday and all day on Mondays.
Brossac is 6km away and is the nearest small town to the gite. Brossac has two boulangeries (bakeries), a boucherie (butcher), a pharmacy and a Spar (mini supermarket). There is also a tourist information office.
Chalais is 16km away from the gite and is one of the nearest towns with a supermarket. You can find an Intermarche in the centre of town and a Lidl just outside of town. There are also boulangeries, boucheries, newsagents, pharmacies etc.
Montguyon is 17km away from the gite and also has an Intermarche supermarket. There are also boulangeries, boucheries, newsagents, pharmacies etc.
Barbezieux -Saint-Hilaire is 25km away from the gite and is larger than Chalais and Montguyon. Here you can find E. Leclerc, Intermarche and Lidl supermarkets, as well as boulangeries, boucheries, newsagents, pharmacies etc.