Chambers said that he wrote the story in a single night.
But the chamber says it is in the dark about how much of such spending will be enough.
The chamber said the issue is best left to voluntary action.
Chamber of Commerce officials said that for the first time they had to turn away more than 100 people.
Chambers said they had been close associates at one time.
Chambers has said she was "delighted to land the role".
"Now we are saying that it will last for at least three quarters," Chambers said.
The chamber said the rise was expected and showed that companies had a hard fight ahead even when the economy picks up.
"Mark created fear, whether he did or didn't do his job," said Chambers.
Chambers said: "I think you'd better go away and leave off bothering us."