Called twice, an hour and a half apart but left no message.

They keep calling. Finally left a message: "We have important information that we would like to discuss with you. Thank you for your time and we look forward to our conversation."

Keeps calling, leaving no message.  I called number back to find out who it was.

they call me 5-10 times a day. They also call from other numbers but I know it's them because I called those numbers back.  I know I owe them money but am trying to catch up on my utility bills before stuff starts getting cut off.

They call me from many phone numbers. I am doing debt relief. The debt relief company has told them to contact them not us, but they still call many times a day. I am about to report them to the FTC and my Senators. They are doing a form of harassment and it is against the fair debt collection act. They are collecting almost 4 times more than I borrowed. I do believe that is illegal also.