Carwash hose piped my engine

Hi<br> <br> I saw a Groupon for a Valet I was excited since Valet are normally expensive and this once cost R300 from R650.<br> <br> So My partner took it yesterday and they told him it will be ready at 16H30 from 8H30. and he only got the car at 17H30 and the car couldn't start. the engine was full of water and car sits were wet. eventually it started but immediately complained about the battery and had a engine sign which meant reduce power and couldn't drive past 20km/hour.<br> <br> <br> This morning I took the car to the mechanic who told me the plugs coil is damaged and suggest that the car be taken to GM for diagnostics.<br> <br> I called the owner of Waverley Plaza Carwash &amp; Valet and explain my situation he was very rude he stated that he has been in business for 6 years and his board state clear that the car valet is for the chassis and engine was. Not only is my car has warning signs when you open the bonnet that shows that you do not hose pipe the engine. which means his people don't care to read and it one car fit all.<br> <br> Now I am left with a huge damage in my car and have no idea what's else is damaged as the owner of Waverley Plaza Carwash &amp; Valet is no willing to pay.