True incompetency

Supersonic does it again. Last month they charged me for 2 lines and I had to reverse debit order and do manual payment. They apologised and told me my account was fixed. This month the same thing is happening, I still owe them R2471 instead of R995. I’m now told the agent who is assigned my account was on leave. She needs to do a credit note then my account will be fixed. Was she on leave for the whole month? Then the lady I was talking to dropped the phone on me because I was so angry because she couldn’t grasp a simple question of how much are they debiting this month, that’s a simply question instead she keeps telling me about the credit note. Supersonic are you debiting the amount on the tax invoice or the overdue amount on the statement? I want to cancel the debit order with you, I will pay manually, I’m tired of the *********** accounts department that is playing games with my bank account.