They were known as Toner Phone when I work at Xerox. Don't them what model you have. They will ship and a bill.
Government back crack down on them.
You will consumer more ink. And it can destroy your printer. Which if you have an agreement with a Copier company.. You now have void your service and leasing agreement. And will be still own them the rest of the term. Plus labor and parts to repair the machine.
This caller is from a company called Greentech Imaging. Basically, they either cold call you or walk into your office trying to get your interest in a trial of their "superior" printer cartridges. When you agree to try them out, you then get calls saying your next group of cartridges will be shipped in x amount of days. According to them, when you agreed to try the cartridges, it constituted a verbal agreement for you to purchase a case of 24 or more...!