Bad service by Sasol petroleum - rewards cards

When I recently visited the Sasol garage in Lynwood road, Retoria I was offered an rewards program Sasol garage card. I was told that i would receive points for all fuel that I would buy from Sasol garages. I was under the impression that all Sasol garages participates in this program. I filled in a form online and received my card. Recently I went on a motorcycle tour to Ballito and on route I stopped at Sasol garage just of the N3 (Thando Tau). When I presented my Sasol rewards card I was informed that this Sasol garage does not participate in this reward program of Sasol. I was taken aback by this as I was never informed that certain Sasol garages does not participate.