Yes, I am telling you they are from the same person. I have seen much more than 29 in other cases.
You confused fake review and fake account, they are two different things. We delete any review that are the result of fraud (such as same user creating many accounts) no matter good or bad. In terms of review content, fake or not is not up to us to say, we do not play the server we can't be the judge in most cases. That is why we encourage server owner to reply to review to show any difference and let the reader decide.
I will have to ask you, how do you know they are NOT the same person? Do you know which user and review are you talking about? You said you read the review and they are coming from old players that played 5-6 month at the server, can you even name one of them?
You sound like you know "them" then you can ask "them" to tell you their user name and email address used for "their" reviewer accounts. Once you got that information, you will be very clear why they are all the same person.