Synovate keeps calling me, but they don't use the same nuimber that has been posted here.  When I say hello the phone goes dead.  How did these people get my number?  I'm on the do not call list.  It's disconcerting.

This  an extremely rude company. They call and hang up. Tired of it.

hi..I get calls from this number regularly. I called my telephone provider here in Canada, and they connected me with "The National Do Not Call list"..I registered my number and at the same time issued a complaint against 305 716 6807.
If you are in Canada the web site is:
https://www.lnnte-dncl.gc.ca/index-eng
there must be a US equivalent. Let's work together to stop these annoying calls., Hope this is helpful