Arjun — Damaging our company reputation with a fake reviews

Dear Team,
Your website is taking the reviews and posting directly with out understanding the genunity of the organisation we are from a company getjobzgulf.com, there is a guy named Arjun he had return few reviews about us, as he is not our customers he is writting all the nonsense and trying to damage the reputation of our organisation.. which is completely not acceptable. And Im not sure why?? With out having a proper evidence why is your portal accepting this... Kindly look in to it and. I'm looking for a immediate response from you guyz