We get calls from this number frequently and simply blocked it. I seriously doubt whether they'll stop calling. The only way they'll stop calling is if people refuse to do business with them. My rule: NEVER do business with robo-callers; never give to charities that use these robocall tactics (they're often fake anyhow).
ID says: "Cell Phone CA"..... Call, say nothing, ignore the screener's warning, and you get blocked! All scammers and unknown, unspeaking callers get blocked forever! Good riddance!