Company A signed a contract on metals with company B. Payment was to be made by D/P at 90 days after sight. Company A fulfilled his delivery obligation as specified in sales contract and presented a draft together with shipping documents authorizing his bank to collect payment. B made the acceptance on the draft upon the presentation and borrowed the shipping documents by a trust receipt from the presenting bank and took the goods. However, at the time of payment, B refused to pay. Company A claimed payment from the presenting bank, bu the presenting bank insisted that he had no obligation to pay and suggested A to lodge a claim against B for payment.

Question: Which party should be liable for the non-payment? Please Explain.