Engen De Bakke Mosselbay - Theft

In a rush to pick up my son from hostel for a medical emergency, I foolishly never checked if the petrol attendant was actually filling, only to realise on my way to George that there was no fuel in the car, made it back after having to put petrol again, on my return enquired at the service station Engen De Bakke Mosselbay about the transaction, I then made them call their manager on which he said he will check the following day, long story short, he had all the evidence that no fuel was put into the car, then he turnes around and says I must bring proof that I filled up after them, really? I was ****** blind by the attendant and then the manager endorsed it.