Poor service

I'm dissapointed with the service. I had asked my account to be debited on the 27th as I get paid on that day. I got two de*****ecks dated 25th wich I rejected and told my consultant to make sure the debit amount goes on the correct date. The debit went on the 25th and now I have bank charges as I get paid on the 27th of every month, my consultant tells me that its the system that picked up the 25th, I dont know what that means and how that is my problem. I have a contract that I signed that stipulates the 27th as the debit date... This is unacceptable!