[Q] return to stock now trapped in bootloader topic

after successfully getting S-ON and Locked i have TAMPERED on boot loader and unable to boot the device, always restart into bootloader and if i try recovery to flash anything i get the green circle with two green arrows then the red rectangle with ! mark in the middle

and since i'm on S-ON now i can't flash custom recovery to restart my process

the ROM was stock/rooted before i reach this step though