Debit order.

I am very disappointed and angry at the same time. I had an insurance debit of Old Mutual. I canceled it a month ago. But standard bank did not. I called standard bank customer service and they said they will Stop and reverse my money. But they did not on Monday i called again they said they can not reverse or stop the the debit order. Of which i don't understand why, because the first person i spoke to said i can reverse and stop it on the App also. So i don't why they **** to me. The last lady i spoke to said they won't be able to reverse my money or even stop the Debit order. I'm not sure if they are ****ers or but i don't trust this bank anymore. I will even close this account. My money is not safe with them.