I had DataDog do this to me as well.

For many of these sales orgs "remove me from your list" just means "flag my entry so that they'll endeavor to find the flimsiest excuse to call you again." DataDog's justification for "call me again after I told them to never call me again" was that an employee had made the mistake of giving them his information at a conference and was interested in using them for a personal project. So that justified them contacting me even after I told them to remove me from their list.