I been updating for more then 5 times already, it had looked like it kept restarting and never updated but when I look at it closer, I see that the size alloted are not the same. One about 64mb while other are 57. I think these are numerous small updates. You just have to keep doing it. However, one peice of advice, if some of your apps are updating, try to let it finish first and then continue to update the software.
Just put any working Verizon SIM card ( borrow one from anyone ) and it will update your cellphone automatically, i did that with S8+ and Note 8 Both from AT&T, both AT&T logo gone but i got the update from Android 8 to 9, i'm assuming when ever you switch your SIM card to your company you will start getting the new updates with the logo from them again, let me know if this works, thanks.