(date)

John Jones 
Regional Vice President 
ABCD Company 
500 Main Street 
Suite 100 
Anywhere, USA 
   
Dear Mr. Jones, 
   
I regret having to write to you about an unpleasant experience I've had with your company. I prefer to contact a company only in praise of an employee or the company's actions. Unfortunately, my situation is such that it is necessary for me to forward a complaint to you. 
   
(In this area, give the specifics of the complaint. Say who you've spoken with about the problem, what attempts you've made to solve it and what specific action you would like.) 
   
I look forward to hearing from you. I hope you can respond within 30 days, so that we are able to resolve this problem in a speedy fashion. 
   
Sincerely, 
   
(your name)