We have had the same experience. To the point that I have created a new message on my answering machine asking them to either leave a message or don't call me anymore. The caller ID just refers to it as Gateway. Sure seems like someone needs to get a life!
"Gateway" has called my number over a dozen times in the past few days. I answered an hour ago and no one was there, answered again just now and a young sounding female asked "Is Dawn/Don there". I told her she had the wrong number and she hung up before I could ask her who Gateway was.
...folks, if it were Gateway the computer company... they would NEVER cold call ANY ONE. So if they ever claim they're the computer company, dont believe it!