To,
The Customer Relation Officer,
__________ (Name)
__________ (Address)
Date: __/__/____ (Date)
Subject: Complaint regarding service
Respected Sir/ Madam,
My name is __________ (name) and I am a resident of __________ (mention locality).
I am writing this letter in reference to the air conditioner that was purchased by me on __/__/____ (date). This is to inform you that due to the ____________ (mention issue – air conditioner not working/ air conditioner not cooling) I booked a service appointment for __/__/____ (date) but no one came in this regard. The technician was supposed to visit on _________ (date) but did not arrive. When I tried to reach customer care, I have not received any appropriate response.
Therefore, it is to request you to kindly take appropriate action for the same and do the needful at the earliest.
Yours Truly,
________ (Signature),
________ (Name),
________ (Contact Number)
Incoming Search Terms:
- sample letter template to company complaining about AC service not done
- complaint about delay in AC service for your AC
lettersdadmin 
Rahul Sharma