语气再委婉些，询问逻辑再合理一些

Dear responsible person of the Sydney University Language Program, I hope this letter finds you well. I am writing to inquire about the status of my previous request to end the language program and receive a refund. I understand that you may be busy with other matters, but as a concerned student, I would greatly appreciate any update you can provide on the matter. I submitted my request several weeks ago and have not received any response or acknowledgement since then. As a result, I am unsure whether my request is being processed or if there are any issues that need to be addressed. I would be grateful for any clarity you can offer regarding the timeline for resolution or any additional information or documentation required to process my request. I understand that these things can take time, but I would be grateful for any assistance you can provide in resolving this matter. Thank you for your attention to this matter, and I look forward to hearing from you soon. Warm regards, [Your Name]