I dont think you have to worry about your reputation Anna. I think that most people that read the messageboard understand that you are a genuine independent and, with all the good reviews previously, there would be no need for you to associate with 'gerryboys' supposed fake review.
I think the fake/rat is intended to indicate that a review may not be genuine rather than saying that it is not genuine.

There are a lot of Irish people and English(Liz Hilton for example) whose grammar and spelling leaves a lot to be desired so bad grammar in a review should not be a basis for asuggesting a review is fake. What I have noticed is that grammar mistakes contained in an escort's profile can sometimes turn up in a review increasing the likelihood of it being fake.

But you are right to express your unhappiness and defend your reputation. Good for you.