Dear Mr. Martin,
We delivered our products to your RMA Dept. at the end of March, which should arrive at our company on early April. But we still have not received them yet. After all we have been your customer for five years, but I don’t think your after-sales service is satisfactory this time. Please let me know your company’s maintaining schedule.
Your earliest reply will be highly appreciated.
安东尼 • 约翰逊 谨上