One call, no message

i get solicitation calls from this phone number 3 times a day regarding contractors liability insurance - im filing suit against them in court.  It is punnishable to $500 per call.  So far im up to $15,000 in damages from this one continous telemarketer.

I am getting about 5 to 10 calls a day from 402-982-0766 and they leave no message.  When I try to call back the number is not in service.  I would like for them to stop calling me.

I am on a do not call list and still recieve daily pre-recorded solicitation messages for contractors liability insurance. If I do not answer the call it keeps calling back every few hours until I answer. When I return the call the number is "out of service".

It seems like 2-3 calls a week.
Today 2 calls within 3 hrs.
They need to stop