I am looking for a current class action lawsuit against Yelp. Any information would be helpful as Yelp is damaging business for me. Thanks!

I put my business on Yelp (my first mistake). Posted on my Facebook business page that my business was now on yelp. A disgruntled ex-employee who was fired for theft and dishonesty puts up a slanderous untrue review accusing me of many untrue things and calling me a mad women (this same ex-employee has also contact my customers on Facebook claiming we are swindling people and that we don't make our own products - very untrue). I receive four 5 star reviews from actual customers in the next 24 hours. All EXCEPT the negative review are filtered. I recognize the names of those customers that had their reviews filtered - they are completely legit reviews and those customers are long term good customers of my business who buy my products. Turns out these customers made yelp accounts specifically to comment on my business because they enjoy my products and customer service so much! I got TWO calls this morning on my business phone from those same customers asking if I knew that those reviews seemed to have been deleted and asking if I knew why! I am now waiting for the Yelp call to try to sell me advertising. Wonder when it will come.