We apologize for any concern this may have caused you. I am relieved to hear that it arrived safely.
We hope to have the opportunity to work with you again in the future.
Thank you very much for your purchase.
We will be more careful from the next time onward, and we look forward to working with you again when the opportunity arises.
Thank you very much for your business.
We greatly appreciate your kind response in spite of our failure.
We look forward to doing business with you again.