This appears to be affiliated with a matchmaking service, "Mature Singles." The robo-calls are incessant, come at all hours, and are unreturnable. Emailed requests to cease calling have not been honored.
Because the site displays the BBB logo quite prominently, my next step will be to file a grievance with that agency.
The email address of the person who followed up by email but has not responded to my requests to cease calling me is:
[email protected]. The email address cited on the website,
[email protected], appears to be a dead end: email is returned as "undeliverable."