Robbie Neilson was furious after referee Willie Collum blanked his request to discuss two key decisions in Hearts' 4-0 William Hill Scottish Cup fourth-round defeat by Celtic at Tynecastle.
The Gorgie head coach was unhappy at skipper Morgaro Gomis' sending off in the eighth minute for his challenge on his Hoops counterpart Scott Brown.
Neilson was even angrier about Collum's decision to award the visitors a penalty early in the second-half when John Guidetti went to ground without any apparent contact from Jambos defender Brad McKay.
The Swedish striker scored from the spot to add to defender Virgil van Dijk's first-half strike and further goals from Anthony Stokes and Van Dijk again eased Celtic into the next round.
Asked if he tried to speak to Collum after the game, Neilson replied: "I tried to, he wasn't speaking to me.
"Some of them do, some of them don't. I don't know what the rules are, they change all the time.
"I've watched both incidents. I'm disappointed on the outcome of both.
"Everyone knows what the outcome of those decisions should have been but the one man who makes the decision didn't see it.
"Morgaro goes in and wins the ball and the referee decides it's a sending-off.
"We can't really argue against it because they always have things they can say - it's reckless, or at pace - but for me the second one, the penalty, is the real changer in the game. I am more annoyed at that but I'm also more annoyed that you can't speak to them.
"If somebody makes a mistake I would rather they just came and said 'look, I did it' and we could move on."
Asked if he thought Guidetti dived, Neilson replied: "The fact you are asking me the question probably answers your own question, doesn't it?
"I'm not going to try to get players sent-off or booked retrospectively.
"Everyone else will make decisions on that."
Celtic boss Ronny Deila had not looked again at the sending off or the penalty by the time he came into the media room for his post-match press conference.
He said: "I haven't spoken to him (John), but from my position it looked like a penalty.
"I think we had control of the game at that point. The red card was more important than the penalty.
"We had good pressing and got the four goals which made the victory comfortable."