I have had 30/40 calls from this number over the last couple months; finally, someone was at the other end today. He said his name was Charles something and he was calling on behalf of the NDP. I told him that I supported the NDP but added that I do not exist to talk politics and I'm tired of being harassed constantly to talk and/or financially support ANY political party. The [***] hung up on me!
I wouldn't necessarily believe this was the NDP: their calls will normally have the proper name (i.e. CANADA NDP) in the call display information. Not saying it wasn't them, but you should call them and let them know about it - so they can either rectify the problem by firing "Charlie" or by investigating into fraud (we know the Conservatives love robocalls!).