Yelp Offered free trial over the phone, charged for free trial period, charged after cancellation and wont return requested phone calls from management. Internet

I contacted Yelp and signed up for a free listing.   I was soon contacted by a salesman offering a free trial and trying to get me to sign up for their "paid" advertising.   I explained that I could not afford this at this time because I was just starting out but would be interested at a later date once I got things going more.

  I told the salesman that I didnt even want the free trial because I did not want a bill the following month for something that was supposed to be free and did not send me any work.   The salesman assured me that I would love my free trial so much and that Yelp would send me so many calls that I would be contacting him when the trial was over wanting to sign up for the paid advertising and thanking him for talking me into trying it.   

After an hour of telling the salesman no and him basically calling me stupid because I did not want the free trial, I finally gave in and said I would try the free trial.   I explained that I just got my phone number hooked up and would easily be able to tell how many phone calls that would be sent to me because I hadnt had any calls yet.   

In my three week "free" trial,  I received 2 phone calls and 3 quote requests and all of them were from different cities than I am even in so as soon as the customer found out I wasnt even in their city our contact was over with no business being produced.   With all this being said,  my credit card was billed 3 days before the end of the month (end of free trial) for approximately $535.00.   

I immediatley contacted Yelp to argue this charge and make sure my "free" trial was cancelled.   I have contacted Yelp through phone calls, emails and a messenger conversation.  I can not get anyone to help me and have requested calls back from supervisors and/or management each time. 

 No one will call me back.   Even though my acount is cancelled my bill still keeps going up.  Now a month later, my bill is over $1000.00 for that 3 week "free"trial and the Yelp Financial department is calling and emailing me for past due payment due.   Funny thing is the financial department cant do anything with billing and transfers me to customer service just like the customer service transfers me to others also. 

I was told yesterday that there is no such thing as a free trial and there is nothing listed on my account showing anything like this.  Its is a joke and really frustrating.   All that has to be done is go back and listen to my phone call to confirm everything I state is the truth but no one will do that even though they have confirmed this recording of over an hour exists. 

I can assure you that I will NEVER use Yelp for anything and want everyone to be warned that this is how they treat their customers.