The Letter format should be like this...By fetching customer details from the case form and generate the letter.
Acknowledgement Letter
Customer Address
-------------------------
------------------------
Dear Customer,
With reference to your Policy No. 253365, we acknowledge the receipt of your complaint dated 17/11/2017 regarding: Policy Servicing.
Your complaint has been registered with Complaint ID E-944391-F9G4 and has been assigned to our Grievance Redressal executive Ms. Mamatha R. You may expect our response within 7 calendar days.
For any clarifications you may contact our grievance officer on 080-67996000, between 9:00 am to 6:00 pm, Monday to Friday.
Please get in touch with us for any further assistance.
We hope to serve you again.
Yours sincerely,
Customer Services