Rented me a Filthy Car - Dashboard full of Brown Dust (not visible in undercover carpark)

Hired a vehicle with Europcar, collected vehicle on Thursday, 9 August 2018 from OR Tambo Int Airport. Drove off and out of the car park into natural light and I see the dashboard on the vehicle terribly filthy. Thick brown dust all over the dashboard. Who did the cleaning of this vehicle and inspection before giving it the go ahead for rental? I raised my query via Facebook messenger on 09 August 2018 and to date nobody has called me. I sent pictures of the filthy car and on Monday, 13 August 2018 I sent another message requesting feedback on the matter but no reply. I am utterly disappointed in the way that you'll treat clients and more so not impressed with the vehicle that was rented to me. Who knows what that dust is and from where it was? Could it be detrimental to my health? I mentioned on my message via messenger that you'll need to seriously consider wavering all etoll/toll fees and fuel top up expenses to compensate for renting me a damn filthy vehicle. When I returned the vehicle I made it very clear to the person receiving the vehicle that I was disgusted at how filthy their cars are. I await your urgent feedback on this matter.