FTC Data
At least 2 consumers from California reported phone number 805-639-8454 to the Federal Trade Commission. 100% of complaints reported the call or text message as a robocall or recorded message. The last complaint was on September 18, 2019.
Morro Bay
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It's the Neptune Society trying to talk you into being cremated. Once you've attended one of their presentations, that opens the door for calls from aggressive salesmen. One strategy may be to tell them that you've signed up with a different mortuary and that they should stop calling.