Complaint Review: A1 Janitorial of Chicago

This company called me to offer me a "free" sample of enzymes to try.  He said he would let us try it and if we liked it, he would bill us.  Well, imagine my surprise when the bill came in May and the product just arrived today 6/24.  Unfortunately, we have a new book keeper and she promptly paid the bill with a check.  I called the company to complain and of course it is paid for, so they don't plan on doing anything.  I asked the person if she knew her company had an "F" rating with the BBB and that the company was nothing but a scam?  I read other complaints and they were all similar.  Scam is the only word that comes to mind with scummy companies such as A1.  Do not buy anything or allow a "free" sample to be shipped from this company.