Hi Kwan,
We have contacted our bank re the original shipping docs and they have told us that they will not release the documents at the moment because there is a discrepancy with the collection value. They have sent the attached message to the bank of Siam. 
The shipment/vessel is due into UK port on Saturday. Any port charges relating to the delay of these documents will be passed back to packer. So please speak with Takerng and see if they can help speed up the process to avoid said charges.
Many thanks.