Hey guys can anyone tell me that what is the format of letter of complaint

Your Name
Your Address

Date 
 

Recipient’s Name 
Recipient’s Address
 

Reference or Subject (as required)

Dear Recipient (Salutation)

Body of Letter:
                         ​​​ First Paragraph – Your purchase, order, service to be complained

                          Second Paragraph – Details of amount involved, dates, people concerned etc.

                          Third Paragraph – Your expectations and experience

                         Call to Action – Request for rectification of the complaint

Subscription – Thanking you, yours sincerely etc.

Your First Name Last Name