Will This Sculptra really go away & go back to my pre-sculptra face?

Because you are quite young the Sculptra may last longer than the typical two years. If you are concerned I would recommend visiting your injector. 

Hi there. I'm sorry to hear that
you're unhappy with the results of your Sculptra Aesthetic treatment. The
product is noted for its longevity compared with other fillers, although its
results are usually diminished by the 3-year mark. In a younger patient, such
as yourself, the results may last longer because your skin has more collagen.
Although Sculptra Aesthetic can round out the face, the results shouldn't still
be advancing at 2 years. I recommend returning to the doctor who injected you
to find out whether Sculptra Aesthetic is to blame for your facial fullness. For
example, if you are clenching your teeth or have TMJ you may actually be
increasing the lateral face muscle mass which could also increase the fullness
of the lower face.

Sculptra is a great facial filler though I am not sure why at 26 you needed a filler.  It will last longer if you are young and you can produce even more collagen.  The results typically do not last more than two years.  It would be good to post before and after photos as well.  Best to return to your treating physician for evaluation.  It is always better to find a board certified dermatologist with a great deal of experience with cosmetic procedures.