I'm sorry to hear about your experience but I had a completely different one.
I used the wipenew on my VX with it having been faded pretty bad.
I apllied the whipnew about 4 mounths ago and have had the VX washed more then a hand full of times. I can say that it has held up very well.
I know that you get a pretty small bottle of the product but a little is supposed to go a long way.
Perhaps you should have refered to their tutorials on youtube(mainly the one that the guy demos on the mazda).
You can see my results in my lattest picture.
Sorry for the bad luck though : /