Why is Bank of Ayudhaya denying receipt of my payments despite proof?

Bank of Ayudhaya i have tried to pay someone in five different ways to an account there over the last 10 days and even when the payee has presented the reference numbers and copies of the payments they have been sent to the bank have still denied they have receiving them. Wise,Revolut Remitly and WU returned as wrong details "they are correct and confirmed" direct bank transfer they deny they have received even though i have proof they have. The account being paid into has been confirmed as working and unrestricted by the bank itself. Total insanity.