Personnel Concepts-Will pester you will threatening calls Received Multiple calls threatening our company that we could be fined if we didn't buy their products Ontario California

In response to an add for a labor law poster that I submitted, I received multiple (like 10 calls) from this company wanting me to buy their service, saying that as a business, the government could fine us if we didn't post the most accurate and recent labor law posters.  I told them that I had gone on line and printed out the ones that are free from the government. But every time they'd call it was the same threatening tone.  All I wanted was the one poster I ordered and I finally had to DEMAND that they send me my poster (I had given them a check) and to please stop calling.    I told them on each occassion to stop calling because we were not interested.  I even told them we started using the labor law service offered through QuickBooks, which they said was not as good/accurate as their service.  The last time they called offering a new product, I yealled at the customer service person, repeating "do not call," and "not intereted," and if they ever called me again, that I would sue.   Have not heard from them in a month.... knock on wood.