call but no message

Called but no message. Called back and a message said you've reached us after business hours, call back between  X and X - no identifier on the message

They called but left no message. Called the number back and got a recording that I was selected to receive a rewards rebate card good at "many stores" just for visitng one of their web sites (who knows, I visit dozens daily). Then to either press 1 to receive the $100 rebate card or 2 to be placed on the do not call list (I thought there already was a national do not call list?). They called themselves Rewards Redemption. The number is reported to be based out of Ventura, California, by Spokeo.com

Unwanted phone call

Just rang once.  This is my second crap phone call today on my cell.