(507) 665 in Le Sueur, MN

This number keeps calling me and the message they leave every time is completely fuzzy and distorted, I can't hear anything that is being said (I can't even tell if it is a person or a computer). Looking on line, I can only assume that this is a telemarketer of some kind because I don't have any unpaid bills or anything. It would seem that maybe one time a call would sound all fuzzy and jumbled, but every time? Seems strange to me. When I try and call the number back, it says that you can't call in. So, whomever this is, is calling and calling and their is no way to reach them because their message they leave is completely corrupted. I worry because, if it is relevant, then, I would like to know who it is, but if it's a telemarketer, which I assume, I want nothing to do with it. People should not be allowed to do this. I have only had my number for a little while, so this probably isn't even a call for me. I am genuinely irritated by this situation and wish that there was a way to call the number back and find out what is going on.