QPR chief executive Lee Hoos says the west London club are "vehemently opposed" to the proposed resumption of the Championship on June 20.
And manager Mark Warburton is equally scathing saying he is "staggered" by the lack of consultation ahead of the date being revealed.
The Premier League announced last Thursday play is due to return on June 17 following the coronavirus suspension that began in mid-March.
The EFL followed suit on Sunday evening when announcing that the Championship is set to restart around the same time - news that shocked and angered QPR.
"I am absolutely stunned by this announcement, as is our director of football Les Ferdinand and our manager Mark Warburton," chief executive Hoos said.
"Incredibly, there has been absolutely no consultation with individual clubs nor with the Championship doctors' working group by the divisional representatives - or anyone else in the Football League - regarding this matter.
"On top of that, we were only made aware of the statement 40 minutes before it was made public.
"The players haven't even returned to full-contact training at this moment and yet they are now expected to be in a position to play at a competitive level in just three weeks' time.
"We are absolutely appalled."
Warburton echoed his chief executive's comments, saying it "beggars belief" to be thinking of resuming on June 20 as contact training has yet to restart.
"Staggered," he told talkSPORT. "I think everyone was staggered when the news was suddenly announced.
"We haven't come back until a week after the Premier League and yet we start on the same day. It's ludicrous."
Meanwhile Charlton boss Lee Bowyer has revealed three of his players - including 11-goal top scorer Lyle Taylor - have refused to return.
Taylor, Chris Solly and David Davis, on loan from Birmingham, have made themselves unavailable for the final nine games with the Addicks in the relegation zone.