Recently I have been getting phone calls from MAS Collection Services asking for someone else. This has been going on for about two weeks now.

The phone number according to my caller ID is (800) 749-7710. I am being constantly pestered by MAS Collection Services about someone else's debt. I am trying to get their contact info so that I can send MAS Collection Services a letter demanding that MAS Collection Services cease and desist pursuant to the Fair Debt Collection Practices Act. I did a Google search for the phone number but I am not getting anywhere.