problamatic sedimenter positioning

I bought the car around two weeks back and it has done only 350km. Now within two weeks I am facing problems with a part called sedimenter which is placed just below the front passenger seat, its placed so low that a sensor attached to it is just 6 to 7 inches above the ground and it is positioned just behind the front passenger wheel. A stone if jumps because of coming under the wheel will surely hit the sedimenter which exactly happenned with me. I was driving the vehicle on a sunday night and it suddenly stopped, I tried to crank the engine but it didn't worked, the next day when I took the vehicle to its authorised workshop after checking the vehicle the service advisor told me that the sedimentor got hit by something and has become faulty we will have to change it and it doesn't come under warranty and you will have to pay for it. I was made to pay rs3670. I don't know what hit the vehicle, there is not even a single scratch on it. Yes if a stone jumps from the tyre its not my fault, the sedimenter is positioned at the wrong place, its so low that the sensor attached to it is even lower than the chassis and i think I should get the part replaced under warranty. Now for the last one week I have been registering complaints after complaints but as you all know nothing is happening. I dont know why they call it a suv when it stops because a stone jumps from its tyre.