How do I uninstall TWRP on rooted phone?

[AC Question]

bought a rooted phone I was not aware of and did a phone update

I been looking everywhere, but cant find out what to do. The phone has something called TWRP on it and I cant seem to get out of it. Ive pressed pretty much every button on it and nothing. Are there some files that I am suppose to download?? I dont care about unrooting the phone as long as I can get back to the home screen Ill be fine. I dont know anything about rooting so can someone help me?