4.4.3 S ON, 'tampered'? topic

with the assistance of the previous owner of my HTC One M8, the phone was rooted. everything worked great until i tried to upload a new rom. when i uploaded the new rom, wifi didnt work and i was S on with the 'Tampered' flag. after countless attempts to unroot the phone i downloaded a factory ruu 4.4.3. i have wifi, no root access, and the battery is awful! i just want to be s off, unlocke bootloader and no 'tampered' flag. i tried using 'SUNSHINE'. they refuse to help. apparently, the person who traded me for this phone and help root the device was very rude to them. any other alternatives? thank you

[Q] HTC One M8 ***TAMPERED*** / **RELOCKED*** / ***Security Warning*** topic

Guys need some help!

I got stuck in bootloader

*** TAMPERED ***
*** LOCKED ***
*** Security Warning ***
M8_UL PVT SHIP S-ON
HBOOT-3.18.0.0000
RADIO-1.19.213311147A1.09G
OpenDSP-v38.2.2-00542-M8974.0311
OS-

It stays on the screen.
Recovery is not installed.
Firmware.zip not installed (FAILED (remote: 44 hboot version check fail)

Please friends help me.