Get more wraps Anthony s. Doesn't honor warranty and makes false accusations Ontario California

I recently took one of my company vehicles ( PowerTown solar) to get a vehicle wrap to this business (get more wraps). The outcome was very unsatisfactory, I told Anthony Steger the business owner about my concerns and in response with a sarcastic tone said " that's what you get take it or leave it" After this sour experience i decided to leave a review on the website page yelp where a originally found them.
After Anthony the owner found out about my review he immediately called me and threatened me to remove my review or he would dishonor my warranty , my response was "I'm not going to remove my review" .
In revenge the owner Anthony Steger went to yelp website posted a false review on our website PowerTown solar and stated that I was supposed to do a job for him and that he gave me a check that I cashed and run away with the money.
Anthony Steger has never been our client and the only interaction we ever had was when I hire him to do our vehicle wrap.