Astron Colesberg, check your diesel

Drove down from Pretoria to Cpt on 15 Dec 2024. My Mahindra Scorpio as ever, light on fuel. Averaging 17-19km/L After pouring R500 worth of fuel at Astron Colesberg.... Down to between 9.5 & 11km/L. Why would this be?

Really? Watered down diesel maybe? Took me two more times to refuel and get that Gump out of my tank. Stuck with just R300 each time so we could mix and get rid of that nonsense faster. Refueled at a proper Engen in Laingsburg, the usage went up to 15km/L..... It's only now that I'm back on 19km/L again on 21km/L.

So upset about this