Is it possible to notify search engines about non-official restaurant websites competing with the real site?

What can be done about fake websites popping up pretending to be the real one? It is specific to restaurants where there are services provided by food delivery services such as in the UK; Just-eat and a few others. Just-eat is a food portal platform listing thousands of restaurants.

The scenario is, a restaurant has its own website ` and uses services from Just-eat and possibly others.

Because Just-eat wants users to go to their platform they make fake websites such as and other platforms make similar such as

They end up with 3 to 4 websites all competing against each other. This results in the original restaurant website competing with these fake websites to rank.

Is there a way to tell search engines about fake websites, contacting the companies to remove it is not an option as it has been tried without success.