Sorry to learn that you are having more problems. My only experience with garages in France was with Ford dealers down the west side of the country in 2015. It looks as though your nearest Fiat commercial vehicle dealership is: Groupe Tressol-Chabrier - distributeur agree Fiat Professional
Chemin de la Fauceille, 66100 PERPIGNAN Tel (Service Dept): +33 4 89 51 98 53
You can do your own search at Distributeurs ׀ Trouvez un distributeur ׀ Fiat Professional should you wish to find a dealership anywhere else.