Had the same problem. When I answered there call they were asking for the person by name that previously had this cell number or was using it on all there credit apps. I know this because about a week after I got my new cell number I started receiving calls from all kind of bill collectors asking for this person by name. Also was getting calls from a college notifying her of new classes being offered. I had to explain it several times to some of these collectors but the calls are hardly coming through (this is one of them I still receive). Not answering does no good, they just keep calling.
It's Kohl's...but even after you tell them you have sent the check, they don't even allow 2-3 for delivery/posting and will call you EVERY day sometimes 2 and 3 times, even after you have talked to someone. Or sometimes it is just an automated call which is really annoying since you have already sent the check!!