American Wilder and the 28-year-old Joshua, who holds the WBA, IBF, WBO and IBO crowns, were in talks for a fight that would unify the heavyweight title but the negotiations broke down.
Wilder has since announced he will fight Tyson Fury in the US on December 1, while Joshua’s representatives have been pushing for Wilder to reach a conditional agreement to fight Joshua next year.
Joshua’s promoter Eddie Hearn and his father Barry want the agreement in place before Wilder faces Fury.
“I’ve sent three separate emails to Barry saying I have no desire to meet with Barry unless I have a real offer for Wilder to meet Joshua,” Wilder’s promoter Shelly Finkel told Sky Sports.
“He and I have been in the business long enough to know what that offer would look like. Where is the new offer? Nowhere to be found.”
Joshua, who is locked in to stage his next fight at Wembley in London on April 13 next year, beat Russian Alexander Povetkin at the same stadium on Saturday.
The Briton, who like Wilder has an unbeaten record, said after the victory that he would prefer to take on the American next, but was happy to fight whoever came his way.