at first use kaput gone,

In my trip to Germany for my exhibitions in this August, (I remaining / sleep mostly in my VW bus) I was hoping to have bought a convenient Lossung for Sanitairen stop. (You can use it on my website kontrolieren [...])
The Enders toilet has gone kaput already at the first use, the closure disc from the reservoir is abgebrochen.Da space occupied much in my car and not to repair was had I throw them away. Can you please report to whether there is a warranty or Possible return of my money there?
My Enschuldigung for my Inadequate German, Are you so please kindly tell me please,

Friendly greeting Tina Lintvelt