I have been harrassed by this company for at least 2 yrs.  I ask to speak to supervisors, there is NEVER on available.... I tell them I am not on the Do Not Call list, it doesn't matter, I have screamed into the phone, blown a loud whistle, and they give back what they get- in 10 fold.  Last week, I lost my temper and told them to quit "f***ing" calling me, my reward for that, is phone calls about every 5-10 minutes.  They mostly come from 000-000-0000, which is unblockable, but they have masked where their calls have come from, I thought I would be smart one late night, and call them back at midnight, imagine my surprise when the number was from a prision in one of the southern states, the guard who answered, told me that they had gotten about 50 phone calls that night, from people just like me, who had gotten phone calls from this number.  I am told that my only solution would be to change my phone number, that's not an option, that I want to take.  On the outside chance there is a number listed for them when they call, and I call it, I am told that it is a non- working phone number.