'm afraid that the enclosed (xyz) product doesn't work. It is the third one I've had to return this month (see attached correspondence).
I bought it from ABC stores at Newtown, Big County on (date).
I was careful to follow the instructions for use, honestly.
Other than the three I've had to return recently, I've always found your products to be excellent.
I'd be grateful if you could send a replacement and refund my postage (state amount).
I really appreciate your help.