I had a $1,000 budget for ads on Yelp

I had a $1,000 budget for ads on Yelp
I got about a 15% increase supposedly by what their records show but honestly did not feel it at all as far as leads as well they wouldn't allow me to put a different phone number for the ads in order to track what's coming in from it which was very suspicious as well I noticed that the lead budget per click always exhausted itself exactly at the end of the month and there's no way for you to know what is a legit click and what isn't and if it's even really generating anyting.
When I stopped paying within two weeks my reviews went from 70 positive reviews and two negative reviews recommended to 3 positive reviews and two negative reviews left all the rest suddenly was not recommended anymore.
So my recommendation is stay away from Yelp.