Hello,
The guide that you had is a guide with 25 years experience who speak English, French, German and Dutch.
This day most of the clients were speaking french, but you and an other couple were speaking english and all the explications of the tour were done in both languages, then of course when the other persons were asking questions in french she was anskering in french.
Then if most of the shops were closed thats not our fault, its low season and its like that in every touristic places in the world, so you should come back in summer and we will be pleased to offer you an other tour.