No you will NOT get a super pastel het pied.
Super pastel is a double pastel, hence the super.
with super pastel X piebald you will get 100% : PASTEL het. piebald
Beside that you can not get a panda pied with a pastel... only with a black pastel in super form WITH pied. 2 different genes
So you would have to get a Black pastel OR a Super black pastel Male/Female (depending on your piebald)
Breed it to your piebald.
Keep 1.1 black pastel het. pied
When both male and female black pastel het pieds are on breeding weight you breed them together
Hope on the odds that you hit a Super black pastel piebald which is 1/16 chance so 1 in 16 eggs