An email or letter of complaint regarding incorrect product model. The letter requests for a refund/ replacement /discount on the goods.
The delivery of [Products] arrived on [date]. We were shocked to find that the incorrect [specifications / models] have been delivered. We ordered Model [Number] but you have instead delivered Model [Number]. We attached our original order No. [Number] and photos of the delivered goods for your reference. [We signed the delivery note prior to inspecting the goods, but as you can see, the goods delivered are different from what was stated in the invoice.]