Write a letter lodging a customer complaint.

Date

Name and Address

Dear Sir/Madam 

This is to draw your attention to [state the nature of your complaint]. I would appreciate it highly if you take appropriate action towards resolving my problem [state what you want done about your complaint].

I am, hereby attaching copies of various documents [List the invoices, bills, letters, notices, contracts and receipts, etc.] to support my complaint. Kindly contact me using the information shown above, and I expect your reply by [date]. Thank you for your assistance. 

Sincerely,