Bradford White Leaking Water Heater after 6.5 years

This is my 6 and a half year old, top of the line water heater from Bradford White. It was professionally installed in my new custom home on city water. It is now leaking and Bradford White wants nothing to do with me and my problem. Although they said they are built to last 15 years and they have some that go 40 or more years, they are not interested in addressing this one that only lasted 6.5 years. Their warranty is convieniently 6 years and they stick to that to the day.