Terrible service

I don't think the staff working at Woolworths call centre knows what they are doing. I cancelled my account with them on the 5th of August already and a week later I called again to confirm because they started charging me service fees for a account I'm not using anymore. So they told me it's cancelled when I phoned them and I believed them because end of August the debit order for the service fee didn't go off. Now today the15th of September they email me a statement owing last month's service fee and the new months service fee. So how does that work if they told me it's cancelled. Really disappointed in the service from Woolworths.