Debit order *******!!!!

These guys have a tendency of taking money earlier than the agreed upon time via debit order. This is total nonsense because that money in my account is not yours and it's not meant for you. You will get your money on the agreed date. Why did I bother making an arrangement whereas you guys are just going to take the money whenever you want. Bullsh*t and unacceptable!!!!!!!! It's my dam money and account, not yours!!!!!