Unfortunately there is little that can be done about cross boarder telemarketers.
The C.R.T.C will only direct you to your phone company who can do nothing for you.
The F.C.C will not discuss it as you are not in the US.
I suggest that you avoid the frustration of calling your phone company and contact Phone Busters who work with law enforcement. They may be able to give you direction. http://www.phonebusters.com/