Admin fees

I was charged R420 for failed debit orders when it is Absa who went to debit my account the day before payday, I tried to explain the situation but the lady told me that the debit order indicator was set to YES meaning they will debit my account a day before if my payday falls on a Sunday, I did not even know about that, and the consultant Rhulani from the personal loans department told me I signed a contract so there's nothing they can do, does this mean I won't be refunded coz if yes, I will take my business elsewhere.