Occupying a government owned land (BCDA)

I would like to seek legal assistance/advice regarding this matter. Willing kami mag shell out ng payment sa makakatulong sa amin to resolve this case. Here’s the story. Inocuppy naming ang isang part ng government owned land under ng PAF (Philippine air force) quarters sa Villamor Airbase nung duon pa nakatira ung 2 previous occupants ng quarters na malapit sa tindahan naming sila naman ang nag kusang pa pwestohin kami dun for us to continue our business since nasa side walk kami before. Now we have a problem nung dumating na ung new occupants ng quarters. Pinapaalis kami since bawal daw kami dun. Question is 15years and counting na kami sa lugar na un. We are asking them for a notice to evict from 520th dept ng airforce. Pwede ba naming ito I appeal sa BCDA since sila ang rightful owner ng lands sa villamor? Or sa city mayor?
Thank you in advance sa pagtulong. Hope hearing from someone sa forum na ito
Respectfully,
Ace