Question [Q] android 4.3 won't load

I was perfectly happy with my VZ S3 running cleanrom 7 until samsung pushed an update through. I have TWRP on the phone. I can't install the update. Verizon points at Samsung and vice versa. Anyway I gave up on trying to find the file name for the update notifier. I tried a factory update and it failed. Now I have to reinstall all my apps. Or rather I have to put them on the screen again..they're still there. I first tried just installing the update through the notifier that popped up. No joy. I was offered "send it in" but with my phone rooted and running a custom rom and theme I don't think letting some Verizon or Samsung tech in is a good idea. I'd like to get 4.3 but it's a real nuisance so far. How can I get the update installed or gone? (either will work for me)