抱歉，剛剛才看到了這個........
老實說，買了這麼多片子，這種怪事還是頭一次發生...
為此我也不太知道怎麼寫信反應...

所以我的反應信是這麼寫的，您可以參考一下
To whom it may concern.
I purchased a dvd from you not too long ago. The item number is:XXXXXX and the title of the dvd is Daylight - DTS . Clearly on the website it has been stated that there is supposed to be a DTS sound system. But, upon trying the dvd, it is absent. I hope you can look into this matter as soon as possible.

Amazon.com的回信倒是蠻快的
Thanks for contacting us at Amazon.com.

I apologize for the problem you experienced with "Daylight-DTS." I
am checking with our fulfillment center to determine if this is an
isolated problem or perhaps a problem with the entire shipment of
these DVD's.

As soon as I receive a reply, I will contact you again. At this
point, you can return the item for a full refund or we can send you a
replacement at no extra cost to you. If you would like a
replacement, you may wish to wait until I contact you again once I
hear from our fulfillment center to make sure that you do receive the
DTS version.

We will contact you again in 1-2 business days with information from
the fulfillment center.

If you do wish to return the item at this time for a refund, you may
return most items sold by Amazon.com within 30 days of delivery for a
full refund. We'll also pay the return shipping cost if the return
is a result of our rror.

Before returning an item, please visit our Online Returns Center to
read our full policy and to obtain a printable return mailing label:

http://www.amazon.com/returns