An email or letter of complaint to the supplier regarding defective product. It describes the condition of the defective goods and notes the increasing number of complaints from customers. It requests for a refund/compensation and urgent action regarding the damaged goods.
The delivery of [Products] arrived on [date]. We were disappointed that we have discovered some defects in relation to this [Product].
The [hardware / software / system / instrument] of this [product] will not work properly, rendering the product [unusable / shutting down automatically / being short-circuited]. We have attached some pictures of the defects for your review.