Petsmart Matthews, NC Aqueron Aquarium products are defective & store will not give credit or return Internet

Very Disappointed with Windsor Square - Matthews, NC Pets Mart.

I have been a customer for over 20 yrs at this store buying all of my cat & fish supplies, as well as seeing Banfield Vet for all 4 of my cats.  Tonight I attemted to return an Aqueon brand aquarium hood & light that I purchased on 2/23/12 for $44.99.  The light does not work - we tried a new bulb & that is not the problem. The light is defective - I do have my receipt & wanted to exchange it but the new Manager on duty tonight would not work with me at all, She told me I had to contact the Manufacturer, which means my fish will live in the dark for weeks.   Obviously, aquarium products do wear out before the warranty & I have returned items in the past with no hassle, which is why I continue to shop there.  They have lost a customer for life over $45.  I can take my $$ to another pet store or Wal Mart.  Shame on you for hiring incompetent employees with no customer service skills.