Google taking people to impersonator's website, instead of mine

Google taking people to impersonator's website, instead of mine

I have a domain which is a combination of 2 words (like paypal is), and my domain is a known name in my niche.
An year back or so, someone registered another domain, which has one part of my domain (the more popular part),
and now whenever someone searches for that part of the domain, google shows them the impersonator's website on top, instead of mine.

For example, if domain is "ABC XYZ dot com"
These people registered "ABC"...

Google taking people to impersonator's website, instead of mine WordPress ...