called me five times in a row but when I call back it says disconnected

I've talked to a girl twice a month ago when the number shows up on my caller ID for about 3 days in a row and always at lunchtime, swears it's a private # and has no idea who calls me.

I'm tempted to report it as harrassment to the PD.

always calls when i'm not at home  have not called it back
I guess i will now

I have been receiving calls from the same number several times in the last week on my cell phone.  The call today was at 12:59 pm and I did not answer.  When I called it back, the recording said that the number had been disconnected, as others have posted here.  What is this about?

The line is a computer used to remind patients of Portage Path Behavioral Health of their upcoming appointments.