Olympic champion James DeGale has branded the Amateur Boxing Association "a bunch of jokers" after turning professional.
DeGale, who won gold at middleweight in Beijing, has signed with promoter Frank Warren, along with Olympic team-mates Billy Joe Saunders and Frankie Gavin. The 22-year-old Londoner claims the ABA owe him money and have failed to deliver on their promises.
"They owe me a very, very big bonus, but they've tried to tell me that because I'm turning pro I'm not going to get it," DeGale said.
"They are a bunch of jokers. They promise you this and that and they don't give nothing. "They are a joke and they need to be shown in their true colours. They go on like they give us everything but they don't give us nothing.
"(Head coach) Terry Edwards has been like a second dad to me, he's cool. But I'm talking about the guys at the top with the bonuses."
Saunders, who was suspended by the ABA in August over allegations of inappropriate behaviour, added: "The ABA have been slow off the mark and let us down on a few things. And the suspension I got for nothing, that's what's really pushing me out.
"If Terry's not going to be there to watch over us, who is? I don't trust them as far as I can throw them really, so that's why I turned pro.
"I like to have a laugh with the lads, but the way they blew things out of proportion, you'd think I'd murdered someone or something. "It was completely stupid really.
But they've messed up for themselves really because in 2012, where they could have had six realistic gold medals, they might only get one, if that."
The Amateur Boxing Association of England strongly refuted the claims made by Degale, which echoed those of bronze medallist Tony Jeffries when he became the first Beijing Olympian to turn professional on Saturday.
ABAE chief executive Paul King told PA Sport: "The medal bonuses were withdrawn in December 2007 and that was based on the premise that the ABA only now receives funding for the grass-roots elements of the sport.
"All of the elite programme is funded by the government through UK Sport. We have nothing to do with that programme as such. Our remit is to grow the sport as the ABA of England.
"The medal bonuses were something the ABA made available out of the goodness of their heart prior to the Melbourne Commonwealth Games to try to stimulate the England team at that time. "Then it went to a GB programme, as did the funds to pay any medal bonuses to the elite athletes. It is wrong that the ABA is having to bear the brunt of all this right now."
King also denied DeGale's allegation that ABA chiefs had shown no interest in contacting him to discuss the possibility of remaining amateur for London 2012.
King added: "I spoke to James personally about the potential sponsorship opportunities. "I arranged to meet him in Liverpool during the European Championships and although he was also there, I did not see him over three days."
DeGale, who revealed he would be paid "something not far off" £2million over two years, admitted he had thought long and hard about remaining amateur until the London Olympics.
He told BBC Radio Five Live: "When I got back from the Olympics there was a bit telling me to stay for 2012. I've got a good relationship with Terry Edwards and everything was going right.
"After thinking about it and calming down you have to think about yourself and your family and I could secure the rest of my life money-wise.
"I've done the pinnacle of every amateur boxer's career, winning the Olympic gold medal."