Their website is rdibizdev.com. Sending Email to the address shown there rarely gets a reply.
Requests to be added to their do-not-call list is interpreted to mean the only the do-not-call list for their vendor.
Their posted privacy policy is just whatever gibberish came with the web page template they got for their web site.
Sales call from RDI. Some imbecile named Bruce keeps calling. Search for the RDI web-site and find the general manager's or President name and get this moron fired.