Three calls from this number.  They are unwanted calls.  No information left.  Please stop calling now.

Returned the call. It didn't indentify the company but said it was a market research or sales call

These calls have been made repeatedly in the evening and I'd like to stop them

They called me 4 times in one hour yesterday. That is really annoying. I called back and there was an automated message saying "You have been contacted for marketing research or a sales call." Then it hangs up. Is there anyway i can stop this?