You can contact this company (Secure Horizon by United Healthcare) directly and have a person contact you at https://www.securehorizons.com/contact/index.html click on the "contact us" and enter your phone number. I always give them an earful and request being removed from their list. This does not happen of course.
Next, file a complaint with the "Do not Call Registry" at https://www.donotcall.gov/complaint/complaintcheck.aspx I do it for each and ever call now.
