****** off petrol of 300

I went to 01 johannes Ramokhoase .crn steve biko Arcadia on friday to put petrol of 200 then didn't move from half tank went back to show them they said is my car problem i asked them to pour another 100 still nothing????. They told m the problem was my car i went to another garage Saturday as i noticed petrol going down poured 300 guess what it moved to full tank???. What is worse is even the owner is a *****. He just was not willing to help me. Is it cause am a women? As that what you all do when we put petrol. Am so annoyed and hate shell garage as they rob people