Asking a reason for cancellation of order through mail

Here's an example of a polite and professional email you could send to ask for a reason for the cancellation of an order:

Subject: Request for Reason for Order Cancellation

Dear [Customer Service Team],

I am writing to request a reason for the cancellation of my order [Order Number: [insert order number]]. I placed the order on [date] and was expecting to receive the items on [expected delivery date]. However, I received an email from your team stating that the order had been cancelled.

I would greatly appreciate it if you could provide me with the reason for the cancellation. I understand that sometimes orders may need to be cancelled due to unforeseen circumstances, but I would like to know what happened in this case.

If there is any additional information you need from me to process the cancellation, please let me know. I would also appreciate any guidance on how to proceed with reordering the items or receiving a refund.

Thank you for your time and assistance in this matter. I look forward to hearing back from you soon.

Best regards,

[Your Name]

This email is polite and professional, and it:

Remember to customize the email to fit your specific situation and tone.