Called my office 3 separate times, and hung up all 3! I called them back, informed them they are no longer to call my work, my supervisor confirmed that no personal calls are allowed, and they said they will still call until I pay a debt I have no information about...

Per the BBB, they are a real debt collector. I don't intend on working with them. I think I will probably wait until they sell it before I work towards pay off...

You'd have to verify this but I thought it was illegal, for a debt collector to harass someone at work because it may cause them to lose their job.  While it may not be illegal you may have some rights to protect your source of income.  Hopefully you have an understanding employer because it may be a while before they stop.

Tried calling on 1/22 at 4:41p, 7:52p, and 8:48p and did not leave a message