Need solution for overflowing septic tank soak pit


Pls advice me a permanent solution for my septic soak pit overflowing issues. We have a total 6 members family (adult-4 children-2) and our home is an independent one. I cleaned up my septic tank after 15 years but problem is not with the septic tank but the soakpit. I consulted with many people, each one suggests different things. Kindly advise me.

Thank you
Jaison, Kerala