Acadia - in the states we have what's called the Uniform Commercial Code.  It covers all commercial transactions if one of the parties is/was a dealer and the goods cost over $500.00.  There are two warranty provisions, (i) warranty for fitness for particular purpose, and (ii) warranty of merechantability.  The former guarantees that the goods will do what they were bought to do.  It can last for a long time (lifetime).  Canada must have a similar law.  There are also options of rejecting non-conforming goods and costs of "cover" (getting a replacement) where there are latent (hidden) defects.  You really should see a lawyer.  "Never negotiate from a position of weakness."  *Testicles.

*Cheers, Frisketus