When your Special Account (SA) is closed after your Retirement Account (RA) is created, any remaining savings in your SA that are withdrawable on demand will be transferred to your Ordinary Account (OA).
You may use the portion transferred to your OA for your housing loan/education loan (subject to applicable limits) or choose to withdraw them anytime for your immediate needs. You cannot choose to allocate more SA savings or your future RA contributions to your OA to service your housing/education loan, etc.