Woolworths delivery vehicles leaking oil on paved driveway.

After having my paved driveway marked by Woolworths delivery trucks leaking oil, I brought this to Woolworths attention 3 weeks ago. After 3 weeks they have not addressed the problem other than to ask for photographs. I have stopped using Woolworths online although I like their products. Pick n Pay take responsibility for their delivery vehicles and do not soil my driveway.