They are obviously debt collectors. They call me too multiple times a day and I have NEVER CONTACTED this number. If they were even telemarketers they wouldn't continually call when they NEVER get an answer.
I received a call just a while ago and they said they were coming to my home to give me an estimate on cleaning my chimney. I called the number back and got the recording that it is no longer in service. This is obviously some sort of scam.