I had the same type of call, calling the number back yields the same recording stating it was for a rebate redemption. The funny thing is that I don't have any type of rewards outstanding.
This number called my phone and rang once. I called it back and it is a recording of someone named Julie. She said this was a rewards program because of a website I recently visited and I had the option to press 1 to collect my rebate or press 2 to be put on the "do not call list."