WBN revealed the news on Saturday as Brook suffered an ankle injury in training and will be unable to compete on the Dillian Whyte v Joseph Parker Pay-Per-View undercard.
Cook, 32, and his family have now begun the cancellation process of plans for the British trip with just two weeks left until the pair were due to trade blows on a massive Matchroom Boxing event.
“Apparently, Kell Brook has hurt his ankle, so the fight is off. That means no fight for me and I’m so upset,” an upset Cook exclusively told World Boxing News this weekend.
“This whole thing sucks and I put so much time into training. It’s the worst news ever for me.”
Asked whether he’d been offered any compensation from promoter Eddie Hearn for the late withdrawal of Brook, Cook added: “Nothing, man.
“I had close to twenty people that where coming and this really sucks for everyone. Everyone is cancelling their flights as I hear Eddie Hearn is supposed to be making an announcement.
“Maybe they can offer me someone else on the undercard of the Amir Khan in September? I’d appreciate that but I hear Brook is out until at least November so we won’t be able to reschedule and it really sucks.
“We knew (Brook was possibly out) for like two weeks but we didn’t get us a straight answer. I’m sure Eddie wanted to see if Brook would be good to fight.
“I just hope he can offer me something for the card in September as I want a big fight and I don’t care who it is. I will fight anyone.
“I want Brook but doesn’t seem like that will happen now,” he added.
Brook dropping off the bill is a big blow to the July 28 card, which represents a top billing on Sky Box Office for Dillian Whyte for the first time without the help of a certain Anthony Joshua.
Whyte is carrying his name into the show as a potential future PPV attraction and is in line to challenge heavyweight king Joshua for a second time in April should he defeat Parker and WBC title holder Deontay Wilder fail to agree a Wembley unification showdown.
For Brook, the ailment means another delay to his two-weight world title plans and a possible fight with Amir Khan in the future.
Phil Jay is Editor of World Boxing News. Follow on Twitter @PhilDJay