Austin Parker,
1234, West 67 Street,
Carlisle, MA 01741,
(123)-456 7890
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Austin Parker,
For a couple of months now I have been dealt with very poorly by one of your store assistants, the customer service is so bad in fact that I felt it was worthy of this complaint. Every time that I am served by Mrs. Jones, I am made to feel that I am getting in her way, and she makes it obvious that she would rather be doing something else.
I feel that you should address this poor attitude as soon as possible. As a customer I do not feel that I am wanted and could easily take my business to another store. It may be worth reminding Mrs. Jones that my business helps to pay her wages.
Sincerely,
Eako smith