Tillers

my new tiller FT900 came with the rear wheel support so badly mis-alligned that the wheels did not track in parallel. also one was tilted up and the other outward. after trying unsuccessfully to bend the support I bought a threaded steel rod that forced the wheels into an approximate tandem position with each other, now at least they roll w/o resistance against each other. this is unacceptable workmanship considering the cost of this tiller vs cheaper competitive models. so how does one contact husqvarna just to register this complaint officially?