I think some of the scam-type callers call you even more if you ask them to 'take you off their call list' or ask to speak to their supervisor. It lets them know that you're a bit naïve about scam calls, so they keep trying. It's best to not talk to bogus callers.
I've gotten repeated calls from this number, as well as 619-381-5877 - both come up on caller ID as 'SSI'. I've never answered the calls and they don't leave messages.
These people continue to call even after I answer the telephone and ask them not to call anymore. Idiots like this should be put out of business, whatever there business is in addition to annoying people.