Different shades, supplier can not help also

We have repeatedly ordered these LED strips. For the first order we were also satisfied (except that the transformer is missing), for the price a fully functional LED strip. Packaging and delivery were also okay.
Since the LED strips but not enough, I have ordered 2 more ...
One would think that if you ordered the same product, you also get the same ...
But it is so that the light bands of the 2nd delivery had a completely different hue. But was ordered was warm white, supplied yellow light ..
The only difference was the date of production of the tapes. Therefore, contact with Amazon and the vendor .. I carried was recommended to return the tapes and to order new. But even with the next delivery we had the same problem again; the color was yellow and not warm white ..
I then made contact again, I was again advised to order new ribbons and return the wrong. But I can still make dozens of times when I always get the wrong color, and it does not help me!

That's why I requested a delivery with the "correct" production date from the manufacturer. Two weeks later I heard still nothing. So have called again. Here one has promised me a call back to 15 clock .. two days passed and still there was no recall takes place.
The next time you call me you could not help, I got the message: "There is so, all I can help." Besides, I still got the proposal but the manufacturer purchased, would you send me the payment by advance payment. Belts on the desired production date they had but no longer available ...

I can only recommend: If the color of the belt does not matter, or you just need one, then you can order it. With increased demand: Let it alone! Rather spend more money on something Higher quality.