Kmart Tyre & Auto Service

I took one of my vehicles for tyres(800$) and a full service(600$)
A WEEK LATER my car wouldnt start, I PAYED for a tow truck back to KTA and it took about 3 days for them to realise the fuel sensor needed to be replaced ($900)
After that, I could smell petrol inside the car.
I took my vehicle back - they asked when did I want it booked in for them to check over my car again (he didnt say ' ITS URGENT FOR US TO INSPECT YOUR VEHICLE IF YOU CAN SMELL PETROL).
So unaware of the potential hazard I made a booking for the following week.
Two days later my family and myself went on an hour drive. As we were driving the smell of fuel and burning became very apparent. I turned the car off, next thing I knew there were FLAMES coming out of the bonnet.
My car was a right off and kmart tyre and auto said they did not do anything wrong for my car to go up in flames. How does this happen to a 4 yr old car???? It WAS their fault!!!!
I HIGHLY DONT RECOMMEND ANYONE GO TO KMART TYRE AND AUTO!!!!