Chaos with monthly installment's and no follow up or updating accounts

I am really tired of all the chaos and violation of consumer's rights within the absa vehicle & asset team. On the 8th of july I received a letter confirming restructure to an instalment of R6900 from 28 July and I called in over a week later to confirm if this arrangement has been loaded and I was assured that 28 July this will be the amount going off on my account. Today an amount R9500 was deducted from my account disregarding the bank's confirmations and in writing. R2k is a lot of money to just think it doesn't make a difference, now my debit order for car insurance will not be paid due to this disregard of customers financial struggles and not knowing what the left or right hand is doing. Please can someone resolve this account and load correct payment structure.