Reuters reports that Australia said on Monday China remains unresponsive to its weeks-long pleas to ease tensions between the two trading partners that escalated after Canberra called for an international enquiry into the origins of the novel coronavirus.

Australia has insisted the call for an independent investigation into the pandemic, which it says most likely originated in a wildlife market in the Chinese city of Wuhan, was not politically targeted at Beijing.

China accused Australia of playing “petty tricks” and the Chinese ambassador to Australia said Chinese consumers could boycott Australian products if Australia pursued the inquiry.

China has also since suspended beef imports from four of Australia’s largest meat processors and imposed hefty tariffs on barley, although both sides say that is unrelated to the latest spat.

Australian Trade Minister Simon Birmingham, who has been requesting discussions with Chinese counterpart for weeks, said Beijing has been ignoring Canberra’s pleas.

“Unfortunately, our requests for a discussion have so far been met negatively,” Birmingham told Australian Broadcasting Corp radio on Monday. “That’s disappointing.”

China did not deny Birmingham’s specific comments on trade, but said diplomatic channels are open between the two countries.

China is Australia’s biggest export market. Relations have been strained amid Australian accusations of Chinese meddling in domestic affairs and concern about what Australia sees as China’s growing regional influence.