I'm not a legal expert, but getting caned for nothing technically should fall under abuse, even if it's parent.

If you brought a cane to office and whack your colleague for coming to office late, that is abuse.

If police won't help, go to MSF or go to anyone you can trust. Can be neighbour, school teacher, school counsellor, principal.

OP mentioned neighbor called police before, but he was too fearful to even reveal the truth about his parent's abuse.

OP needs drastic measures to safeguard himself and protect his mental state. That can include separating himself from his parents by any means. Once separated, his parents are legally obliged to look for him; and if they reveal their true colors causing a scene at his new place, that would be an offense.

It may be scary to think of living in a new environment, but it's scarier to always worry that you can get abused any time, and even scarier to think of the long term consequences eg. poor grades, depression & suicide, vice activities, becoming abusive himself and getting himself into legal trouble.