Call back gets "Thank you for calling. I'm sorry no one is available to take your call. If you'd like to be placed on our do-not-call list and not receive any more calls, state your name and number.....etc." It ends without ever telling you the name of the company or the purpose of the call. That means they are deliberately hiding their identity and purpose. A legitimate company would state their company name withing the first few seconds of the recording. This is clearly some sort of SCAM. Block it.