Following completion of agreed work full payment was made by a transfer of funds from my bank to the nominated bank account. I have the initial bank to bank transaction receipt. The tradesman reported that the money did not arrive and a cash replacement was arranged and signed for. I have the signed acknowledgement of the cash replacement. Claiming non-arrival of funds I attempted to reverse the initial transaction. My bank investigated the matter and found that the transaction was completed as instructed. The nominated tradesman's bank refuses to disclose any details , including whether the money arrived into the nominated account...citing privacy concerns. The tradesman concerned denies double payment has been received. Is this legally actionable under Australian Consumer Law?