Kia Rio Tyres worn out soooo quickly

I bought my car in 2014 Nov and to my suprise, all my tiers have been worn out to date mileage is seating at 28 000. When I spoke to my service advisor yesterday (while trying to tell him that I have spoken to most of my close friends who own Kia cars about their experience i.e. how costly the car is, he was so defensive to a point where I felt that he was insinuating that I was lying, telling me to get the registration no of my people's cars so he can see if I an m not lying!!! really) he had a bad attitude and the service there i.e. customer care is really bad!!!<br> <br> My issue here is that I have previously owned cars and have never had to replace tiers at such low mileage!!