The site is completely garbage and allows fake reviews to damage reputation built by good business. And in their response to your fake review removal, they explicitly say they don't care in a way as quoted below.
"Please note that we are a neutral review platform where everyone, not only the customers but employees, ex-employees, people who never used the services/ products of your company can leave their reviews on PissedConsumer.com. We do not investigate the postings or users."