Standard bank Honoring Fee

So Standard Bank charged me Honoring Fees amount to R549, on the 23rd when I did purchases I was left with R1200 on my account. They decided to debit R2722 for my Revolving account installment on the 23rd, without my consent or communication if it's ok to debit earlier as this payment goes of on Salary day monthly "as per agreement" , not just on any random day. Acc went to negative because of that. They charged me Honoring fees for purchases I did when I had enough amount to cover. So now I'm accountable for R549 charges which was made by Standard Bank on purpose. This must be fixed as it is not my fault that they decided to debit 2 days earlier before pay which is on Friday 24th of December. The always get away with this but this time it's definitely not my fault and they broke an agreement.