Engen near the Parks Fourways - Bad Manager

My car was filled in error with Petrol (I drive a Diesel Engine) of which I understood and the gentlemen who helped were willing to help however way possible - but their boss is horrible, all He wanted was to get rid of me by forcing his misleading advises. His attitude towards his customers is bad, I felt useless when He kept on pushing me to agree and yet did not want to have something in writing that should there be anything going wrong, He takes full responsibility. That is my normal fill up station and the Engineers are always welcoming and helping, but the Manager - ayy enye indaba leyo, was really dissapointed.