This is an automated call for continuing your education. They called me 3 times today finally the 3rd time the automated message came up I answer a couple question 'no' about continuing my education and it say 'thank you for your time' and hangs up.
If you're answering in any manner, you can expect it to continue. They like calling people they know that has a number with some kind of an answer. Ones that have nothing at all, not so much and they can get tired of wasting time with those. Let unknown numbers ring with no kind of an answer and be patient. You should eventually notice a decrease in the volume of calls you get.