Walk Behind Lawn Mowers

I'm frustrated with my Husqvarna 6021P walk behind push mower.  I bought the mower the summer of 2011 off of Amazon.com. I have used it the last 2 years as just a mower for ditches and around landscaping because of I purchased a riding mower.  Earlier this week as I went to turn around while mowing my ditch, the front wheel fell off.  I thought perhaps it was just a loose bolt that needed to be tightened, however as I looked closer the actual metal hole where the bolt secures the wheel just broke.  There's no fix for the wheel unless it were to be welded back together somehow, but I don't have that ability.  I have taken meticulous care of all my small engines, this one included.  I've never had any problem with the mower and have been pleased with its ability, however I am extremely disappointed by its short life span.  I bought the mower based off of consumer reports ratings.  It is the first Husqvarna product that I have purchased, and I have never had a mower have an issue like this so quickly.  I tried to look at a warranty, but I'm not sure what that is because of my purchase off of Amazon.  I was hoping to talk specifically to someone at Husqvarna to see if they would back their product and offer to either fix or replace.  If not, this will be the last Husqvarna product I ever purchase. Thank you for the help.