We have been using the  BLUE ROYAL vac that you seem to be talking about for over eight years now.  We do house cleaning and it has been used very hard. The only thing we have had to replace is the roller brush and the floor brush.  We have used a lot of different vaccums, and must say, none has even come close to the ROYAL.  We are in fact going to buy another as a back up and hope it will serve us as good as the one we now use.  Sorry you had bad luck, and hope you find one that will fit your purpose.  Carl