The very same thing happened to me. They have called every day for several days and when I tried to call back I got message no longer in service - just minutes after they called.
This number called my house this morning at 9:30 a.m. I answered and a woman asked for my husband, by his first name only. I said he was working and could I take a message? She said, "no, it's just a courtesy call and we"ll call back later". Not sure what it was about????