Complaint about a product
To: company name
Attn: name of person, title, department
Dear Mr. / Ms. last name
Re: Complaint about a name of the product
On xx/xx/xxxx your or your's organization name purchased from you a/an product name, model.
When I/ we opened the package/ tried to install/ etc I/ we realized that description of the defect
I/ We shall appreciate your treatment in this matter at your earliest convenience.
Kindly acknowledge receipt of this letter.