I live in Fremont, California, I have been a member with Yelp for over 20 years. Every time, I made complaints I got responses right away. My gut feeling is that Yelp is a resourceful and reliable website.
Megan Marrs: "Many review sites have come and gone, but Yelp has continued to be a highly trusted source for local business reviews and ratings." ~~ https://www.wordstream.com/blog/ws/2013/07/22/yelp-reviews