Log myself out of an old device

My my account is linked to a family sharing one that I am not part of nor did choose to be a part of, I bought the phone from appears appear marketplace and the old Family organizer of the account added my iCloud to their family sharing plan and now I can't download apps on the App Store because the iTunes account and the app Store account doesn't matchMy account is linked to a family sharing one that I am not part of nor did I choose to be a part of, I bought the phone from appears appear marketplace, and the old family organizer of the account added my iCloud to their family sharing plan and now I can’t download apps on the App Store because the iTunes account and the App Store account doesn’t match. I ended up having to get a new iPhone because I wasn’t able to login. . I ended up having to get a new iPhone because I wasn't able to login to my own iCloud North sign out of the Account that was previously logged in. I ended up having to get a new iPhone because I wasn’t able to login to my own iCloud North sign out of the account that was previously logged in.