You can file more RTI applications on same matter with same public authority [govt. office] but with different queries. Queries for which SIC has already passed order cannot be re-sought by you. If you are not satisfied with acts of PIO you can file first appeal by visiting:
HOW TO FILE FIRST APPEAL [CENTRAL/STATE]
How to write First Appeal under RTI? - RTI Guide
If SIC orders are not properly complied please visit:
If PIO has belatedly replied your queries, you can still pursue your complaint for penalising PIO for delay and compensation to be paid to you for delay.
It takes each of us to make difference for all of us.