Here is a sample complaint letter written to a car company.
23, Iverly W
Los Angeles, CA 95645
31 August 2016
Phone: 323 088 3424
Subject: Complaint about breach of contract
Sigma Cars Pvt. Ltd.
850 Racine S
Bikslot, CA 65420
Dear Mr. Rogers,
This is to inform you that I had purchased a Montage HT from your dealership on 28th September 2015. However, the local Sigma Service Center is not providing me free car check-up and maintenance.
In the buying contract, it was clearly stated that I am entitled to receive free service on my car for a year which in my case becomes 28th September 2016. When I approached the local service center to carry out a mechanical servicing on my car, they informed that the policy has changed and that I will have pay for the service.
Consider this letter as a formal complaint citing breach of contract. I want a proper explanation from your side, failing which I will take legal measures.