Ask who you ordered it from.....

You just need to know how to identify a filed reed.

Hold both reeds vertically, facing to you.

On the filed reed, there is a perfectly horizontal line (perpendicular to the grain of the reed), that separates the base of the reed from the tapered/shaved part.

On the unfiled reed the taper blends into the rounded base forming the shape of a U.

The filed is the  red evidently.  

In the future, try a using a sharpie when you open the reed up for the first time.