Payment arrangements agreement not followed by Capitec bank

A month ago I gave a compliment to Noxolo from the collections department because she was able to assist me with payment arrangements. Today Capitec bank ruined the arrangement that me and her made. Capitec was supposed to debit R740 last month and this month then make proper arrangements after this month debit order. To my surprise today an amount of R1436 was debited from my account, I would like the balance to be reversed back into my account as this will cause my policies to bounce. I am very disappointed with the service I received today. I need this to be rectified urgently.

Your feedback and assistance will be highly appreciated.