LifeinAsia - 2:55 pm on Apr 19, 2013 (gmt 0)
doesn´t they have any rules for good manner?
About the only thing Google cares about (and even then, not very much) is copyright violations.
My understanding of your post is as follows:
1) Person A asked about your company.
2) Person B misunderstood and answered about another company.
3) Your attempts to get the company or person B to edit/remove the reply has gone nowhere.
Other than the poor service provided by the forum owner, there's no real legal/moral issue. (And if poor service or bad manners were illegal, most of the world's companies would be out of business because the owners would be in jail!)
If, however, the reply was an intentional attempt to damage your company's reputation, then you might have a legal case against that person, and possibly even the forum host. But actually being able to prove that would probably be extremely difficult.
Again, discussing the issue with a lawyer is most likely your best bet.