Popular fob-off lines of faceless bureaucrats

"He is in a meeting at the moment"

"She is on leave at the moment."

"We have no responsibilities in that area."

"That's a matter for the Department of XXXX, not this department."

"You can't prove that."

"We are too short-staffed to deal with this matter."

"That's a civil matter, not a matter for the department." 

"I'm going to terminate this call because we seem to be going in circles." 

"I don't see a role for the department in this case."

"That's only a historical event."