login won’t work locked out

the app for xfinity asked for log in agian and not i can’t get in on my ipad, newest ios and reset back to factory settings. my iphone works nothing else will for xfinity works on my ipad. i can log into the app it keeps asking for my log in name over and over again. don’t know what to do. it says now try at it is locked. i pay 300-800 a month with purchases and now cant use my ipad. PLEASE help