Quality of horse boxes - extremely poor

<p>We have bought a brand new horsebox from Challenger Trailers about a year ago.  In the past 12 months we had to take it back about 3 times to fix things that are breaking.  Now the box is starting to crack between the panels.  We have contacted them and they advised us that the trailer is now out of warranty.  We have asked them to refer it to the MD as this is unacceptable, but up to date we have not received any feedback.  </p>