Poor service - None cancellation of debit order

We have been trying fot more thans a year to get a debit order cancelled. Despite various rnails and wasting a lot of fuel to visit a Standard bank branch we have still not gotten the matter resolved. They keep on presenting it monthly. We are being charged bank charges for over a year because of the poor service and still no result. We have been Standard bank customers for years and am really disappointed by this poor service.