Dear Mohan-Jayaraman,
Our most appreciated member & super moderator KK!HR rightly said that your pension is due from the completion of 58 years. Upon reaching 58 years, your contribution towards the pension is stopped, and that amount is credited to your PF account by your employer. The VPF portion remains in the PF only and is never part of the pension, so the question of VPF does not arise.
Since you have completed 11 years in the pension scheme, you are entitled to a monthly pension for your lifetime. You need to apply for the same. There is no interest on the amount contributed towards the pension.
Option to Defer Pension
We had an option to defer your pension up to 60 years of age by continuing the pension contribution. In such a deferral, you were entitled to a 4% incentive extra for one year and an 8.16% incentive extra for two years.
You also have the option to apply for deferring the pension without contribution.