harrassment at work (illegal)

Whether I have a debit or not is irrelevant to my comments here: This collection company subjects me to multiple RoboCalls every week at my place of employment. I have spoken to them advising them "The FDCPA limits how, when, and where bill collectors can contact debtors. Many of the rules apply to a debtor's workplace. The FDCPA prohibits debt collectors from contacting debtors at inconvenient or unusual places. Some workplaces, by their nature, are inconvenient places for debtors to take collection calls. Examples might include schools (if the debtor is a teacher), hospitals, funeral homes, and restaurants.  If it's inconvenient for you to take calls at your job site, let the collector know. Another section of the FDCPA expressly prohibits collectors for contacting debtors at work if the collector knows, or has reason to know, that the employer prohibits such communications. Many employers have policies that prohibit employees from taking or making nonemergency calls for personal business, which would preclude an employee from taking a collection call.  Additionally; because the law prohibits "communications," these restrictions apply to other forms of workplace communications, such as email, faxes, and texts".
But the just keep calling.