This number calls me 5 times a day when I answer the ask for someone that is not living here yet they keep calling!

They call my house up to 5 times a day and ask for my husband. I do not know where they got our number from, because we are not listed. I asked them and they keep telling me he has asked for information for colleges.  My husband already has a degree and I want to know where they got my number from. When I ask this question, they hang up on me.  I have told them several times not to call my home anymore, and they tell me that only my husband can tell them that. I WANT IT TO STOP.