I'd take notice.. and I would sort it out myself until I was satisfied.
If I could not get satisfaction I would not deal with that person again.
If someone asked me directly " what is your experiance with the retailer in question" I would relate my experiance to that person.
That way I could not be found Liable for slander and for defamation.
It is one thing to tell a person that "if I were you I would not deal with that company" it is in fact quite another to tell the world
One is hearsay the other is published and there are very real and potentialy expensive ramifications for those differences.
CAPS Range Officer
Toronto Downtown Age Verifier
If the tongue could cut as the sword does, the dead would be infinite