Why has my car's mileage decreased after a repair?
I have a 2014 Hyundai i20. It went into my insurer's repair shop for some collision damage after an uninsured driver hit my parked car. Mileage at that point was XXX68. (trying not to be identified). Petrol gauge was showing one bar over half full when it was loaded onto a low loader to go to the garage. I keep my instrument display on "miles left with current fuel", when it came back it was showing Trip A 0.4 miles and XXX69 but the fuel was now showing exactly 1/4 tank. I have photos proving both of these.
Unfortunately they hadn't completed all of the repairs so it went back on the truck to the insurer's repair shop again.
2 weeks later it came back to me again but this time the display read Trip A 0.0 miles and the mileage was on XXX68 again.
I had complained about the missing fuel so it came back to me with just over 1/2 a tank.
I have concerns that they have used the ODB thing to alter the mileage. I do not trust them to have done things properly and yet again it has had to go back to them to fix an incomplete repair.
Who do I go to with these concerns? I lodged a formal complaint when the car came back the first time but still haven't had a response.