@Loulou2410 There is nothing that the Forum can do for you, and you are not talking to EE direct, you need to change the billing by yourself via your account, or call EE CS and have them do it for you.
The general is billing date is X and the direct debit payment is taken 8 day's later, so yours would be 1st of month to be taken on the 9th, day's vary depending on the day of the week link below may help if not contact EE... HTH
Ways to pay your bill | Billing Help | EE
Contact Us | Help & Support | EE
