Mourinho was sent off late into defeat at Aston Villa for approaching the ref.
Mourinho said: "I tried to speak with Mr Foy twice. I tried on the pitch and I tried in the dressing rooms. He refused."
Reminded about the convention that managers should not approach referees for 30 minutes, Mourinho said: "This is not about conventions, it's about common sense. If you see someone out of control, OK: convention.
"But if you see someone is calm, is not screaming, it's not the convention. Simple people from football don't need conventions."
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