I picked up when they called, said hello and it was dead air - and they hung up first.  So, i called the number to see who it was and it was a recording that said "This was an attempt to call you to make sure you had an outstanding experience on your recent call to Walgreens - goodbye".

I called the number back to see what it was and the recording says, "This was an attempt to call you to make sure you had an outstanding experience at your Walgreens recently".

Calls & hangs up, no msg. left on answering machine.  Caller ID says Walgreens.

Calls and hangs up.  No message left on answering machine.