This person has been calling me for over a month every single day. Yesterday he called 6 times on a private cell phone. I don't have time to answer 6 phone calls a day. I have asked him very nicely to take me off of his list. He just calls back anyway. It's extremely frustrating considering I work 12 hours a day at a very demanding job.
The person calling you is a criminal.
You cannot be polite to these criminals, you have to take evasive action.
This particular number does not exist in North America - there is no exchange "111" in any area code.
So you can ignore calls from this number, or use a call blocker.