[Q] Emergency help needed topic

Well I restored my back up of a rooted VS980 rom, 26A version. I did so because i honestly grew tired of the bugs with my LP rom i was using so i decided to return to stock and update to the 27A firmware. When I went to allow the download to install all it did was reboot to twrp recovery and now I cant flash any rom to get it operational, I for the love of god apparently dont even know how to enter download mode. Ive read its hold vol up and plug in but that does nothing but once again BOOT INTO TWRP recovery. I just want my cell back to stock with no root and ill make any needed mods as i see fit.

Ive tried to use the flash tool but even that requires a download mode which i can not enter, and it wont even display correctly for me anyway.... Any one have any advice?