I called the number back. The reocrding said all teh agents were busy but gave me the option to press "2" to be removed from the calling list. I did; we'll see if it works.
Doesn't do any good to use THEIR "take me off ... list".
Also, it's best to never call a number back unless you recognize it.
If anyone calls - personal, business, charity, etc. - that is legit, they should leave a message. If they don't, don't waste your time. And if you are calling a scammer you are just causing yourself more trouble.
I just block the numbers or, if I need to, the entire area code.