Question for ENFORCEMENT & COLLECTION AUTHORITY

WE HAVE A PENDING DEBT FOR OUR EXPORT SALES OF INDIAN BASMATI RICE TO CLIENT IN ISRAEL. THE BILL WAS SEND VIA BANK TO BANK AND ON PAYMENT AGAINST ACCEPTANCE. DUE FOR PAYMENT WAS 26/.AUGUST/2016 AND THE SAME IS UNPAID KINDLY ADVICE IF YOU CAN HELP