We have not received the statement for the period from dd/mm -dd/mm, and would appreciate it if you can send it to us ASAP.
Thank you and regards,
Xxxxx
以后过几天问：
Hi xxx,
I refer to my request to your childcare centre on dd/mm, and that we still have not received the required statement, can you please send it to us by dd/mm (give them a week's time).
如果过了你指定的日期依然没有回信：
Hi xxx,
This is the third time that I am writing to you for the payment statement for the period of when-to-when, as we still haven't received the requirement, we may have to review our enrolment with your center, and we shall have the right to review the financial arrangement with your center.
I am happy to discuss this with you further on email or at a face-to-face meeting, and I hope this can be resolved ASAP.