They don't pick calls they will just burn ur call credit, I even called canada to complain they said they don't really have any power over it since it's been transferred to visa office...
The canadian call center will not intervene. Have your sponsor call their Member of Parliament and complain. i also joined a group called spousal sponsorship advocates. they are on facebook and twitter..... they are a wealth of information. they even had a lawyer doing live chat explaining how we can file a writ of mandamus if our file is taking too long and that would basically force the immigration officer to make a decision.