Caltex Waterfront damage my car

On 27 Feb at Caltex Waterfront in Cape Town an attendant put diesel in my petrol tank. My car started shuddering almost immediately after leaving the station. In short, it cost R2000 to get the car repaired. Ive tried in vain to get a response from Caltex management at their Waterfront branch, but each time they promise someone will contact me and no one ever does. Its now almost 2 months later with no responsibility being taken on their side. Not impressed.