Standard Bank - Shoddy Service

I bank with Standard Bank. I transferred money to my supplier's bank overseas. The supplier did not receive the money. On checking with Standard Bank, I was told that the transfer to the overseas bank was made timeously. Standard Bank enquired whether it could make enquiries with the bank overseas at a cost to be borne by me. I gave the bank the go-ahead some weeks ago. My repeated e.mail messages for a response are going unanswered. This division of the bank is not contactable by telephone. Shoddy service.