signpost marketing scam, unprofessional, took my money with zero return, targeting my clients instead of bringing new once new york New York

I am a small business owner and was approached by Signpost last year in April. I signed up for 1 year contract and paid $1,200 upfront. They promissed to promote my business and generate new sales. 

They asked for my client list and started targeting my clients instead of bringing me new once. it has been 10 months since I signed up with this company and did not get one new client. In the bigining they would send me an email once a month, after August I never heard from them again.

Yes, they are a scam and I don't want other people to make the same mistake I made. Please don't waste your money on these people. I usually don't write online reviews, but I am so upset that they took the money and did nothing in return. 

Signpost should not be in business.