Picked up (usually don't) dead air, hung up.

I have received many calls from the same people, but all using different numbers. It would come from "Roselle, IL" and be a 630-329-XXXX number. I would block it. I'd get another call from the same number but different last 4 digits. This has happened with at least 6 different numbers. Now they are starting to use 312 numbers. No option to be taken off the list. I've tried staying on the call in order to finally get to a live person, but they ask personal questions such as age and income bracket. Don't know how to make all of this stop...

Called on my cell phone, I answered; Emily said that because I've stayed at one of their resorts or a partner resort, I'm entitled to a DRASTICALLY reduced rate for a round trip vacation.  I told her I wasn't interested and to please take my number off of their list.  She said, "Okay, have a nice day!"  I blocked the number anyway.