The Indonesian government has warned it does not respond to threats, after Prime Minister Tony Abbott reminded the country it had provided $1 billion in aid after the 2004 tsunami.

"Threats are not part of diplomatic language," Foreign Affairs Ministry spokesman Arrmanatha Nasir told reporters. "And from what I know no one responds well to threats."

Earlier Mr Abbott said Australia would let Indonesia know in "absolutely unambiguous terms that we feel grievously let down" if the executions of Andrew Chan and Myuran Sukumaran proceeded.

"Let's not forget that a few years ago, when Indonesia was struck by the Indian Ocean tsunami, Australia sent $1 billion worth of assistance, we sent a significant contingent of our armed forces to help in Indonesia with humanitarian relief and Australians lost their lives in that campaign to help Indonesia," he said.