Not sure why this has been dragged till now when your office already had the confirmation on cost.
Kindly arrange to move containers right away without further delay as we are not going to pay any detention / demurrage cost after 30th as we have already reverted with the confirmation on same.
Let us have the invoice on the name of Raj Chemicals Limited Hong Kong till 30th July which we shall arrange to transfer in USD to your Thailand Office.
If your office would have stuck somewhere than they should have been raised the concern rather waiting for buyer to revert back on this.