Simple notice to a customer who with negative account balance

Hello,

I would highly appreciate help with the message below. Started some small business (prepaid service) but some customers keep forgetting to pay on time. It is still in development otherwise I would pay someone to help me with English

---

Dear Customer_name,

Thank you for using our service_name prepaid subscription service.

As of today it came to our attention that you created a negative balance of $amount on your prepaid credits for our service. We would like you to pay the above balance at your earliest convenience and if you intended to continue to use our prepaid services in the future, please proceed to this link to place an order for additional prepaid credits.

NOTE: Please note that this is your notice_number (example: first) notice.

Our commitment to providing you the best service_name service is our primary goal. We look forward to continuing our relationship with you in the future.

Should you have any questions or concerns, please do not hesitate to contact us.

Sincerely,

---