Pls accept our hearfelt apologies for the late delivery of goods to your company.
This delay rusulted from the order he missed by the people who in charge.But we've alrealy put it in production ,and make sure you'll receive it on(交货日期).We are sure such delay won't happen again,and I hope it doesn't inconvenience you so much.
Hope you'll forgive our mistake and continue our cooperation.
Thank you for you support and consideration.