  Scattering and reaction cross sections of $e^{\pm}-Ps$ system are calculated
for total angular momentum L=0, 1 and 2 and energies between the
Ps(n=2)-Ps(n=3) threshold. We solved a set of Faddeev-Merkuriev and
Lippmann-Schwinger integral equations by applying the Coulomb-Sturmian
separable expansion technique. We found that the excited positronium states
play dominating roles in scattering processes.
