Q:Can’t log in

i can’t log in to my iphones Appel ID it works fine on my tablet and online, but when i click sign in at settings i get told to type password and ID which is correct because I’ve reset it quite a lot lately to try to log In. But it says logging in and then when its done it says that I need to sign in again. I know this isn’t a glitch because neither email nor iCloud works even after my 8th sign in. What should I do?