I'll hit you up on PM mate... I'm quite experienced on this sort of thing having setup multiple businesses in the past with social media networking and training.
The short of it is you can self remove them. Whilst you can disable reviews completely, I honestly wouldn't as sometimes it can look worse then having them.
Biggest **** of a reivew place though is Google reviews. Easy to do, IMPOSSIBLE to have removed without suppoena against Google, and even if your company doesn't have a Google business account, anyone can tag the business as being there and start reviewing it. Google need to pull their heads in regarding them.
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If you wanted to be an arsehole, you find out where they work, or their business, setup 2 Google accounts, and then use one to report their business as closed, and the other account to confirm it as such