Dear Pardeep,
Under Pension Fund Regulations, one can become a member of the pension fund, but cannot withdraw from it of their own accord. The only exception is that if one attains superannuation before completing 10 years of service, they will not be eligible for a pension; therefore, their contribution towards the pension will be returned. In your father's case, it seems he has completed 9 years of service. If he has retired upon attaining superannuation, he is not eligible for a pension, and his contribution towards the pension will be refunded to him. Has he or his employer contributed to the pension fund on his behalf before? If that is the case, his employer will return his contribution towards the pension fund.
Regards