I blocked my # and called back, recorded message:  "Thanks for calling.  The survey you are responding to has ended.  If you would like your number to be removed..."  Don't ever enter a number to be added to their no-call list, as they will just sell you down the river to some other MF's who will call you with dumb BS sales pitches.

Call from Keenesburg, CO. Did not answer. called back on another phone and the number was busy.

Call from Keenesburg, CO. Did not answer. called back on another phone and the number was busy.
White pages has 'Flagged as Scam Or Fraud'.

scam caller.  no message left.