Saw this on my caller ID too. Only one I can think of is I've been getting tons of calls under all sorts of numbers from the Church of Scientology. Took oine of their classes 30 years ago. Once you get on their list they hound you forever.
They are doing a new call campaign to try to get your money!
I went through the same thing with those idiots. I know that they are VERY protective of their BBB (Better Business Bureau) ratings. If they bother you again, find out what org they are calling from, then file a report complaining of harrassment/stalking....... with the BBB in their city.