The automated calls contained a message directed against the leader of Projet Montréal and broke election rules because they didn't identify who was paying for them. Instead, the recorded message said the calls were from an "independent research firm.”
Côté said he accepts responsibility for what happened, though the mistake was made by the company hired to make the calls.
He said campaign staff were busy preparing for a debate and didn't properly verify the text of the calls.
"It was a mistake, I take full responsibility,” said Côté.
The calls links Projet Montréal elected officials with a "funding controversy."
Bergeron said he will file a complaint with the province's Chief Electoral Officer, saying the calls were “odious” and “dishonest.”
Mayoral candidate Denis Coderre also said he will file a complaint, even though he wasn't targeted.
"I think its disgusting. I'm totally against that. This is not [our] kind of politics. I despise that," said Coderre.