Robed at Amahlubi service station

Shell last week went to amahlubi service station - Shell to buy me pie. As I'm on the wheelchair I can't get out and pay it my self, I asked one of the guys working there to assist me coz I know him. I gave him R100 and never return with my change. Went there again still I have not received my change. I've been ****** or taken advantage off since I'm I'm wheelchair bound and that's not ok.

He's name is Athi. we can't be taken advantage off since we are physically challenged.

Kind regards