How my phone got disabled

Do you mean your account is having issues, or the phone itself?

If you see a message that says "Your account has been disabled in the App Store and iTunes," click here --> https://support.apple.com/HT208856 and read what you need to do.

OR:

"If your Apple ID is locked or disabled" click here and read what to do --> https://support.apple.com/HT204106 - "If you or someone else enters your password, security questions, or other account information incorrectly too many times, your Apple ID automatically locks to protect your security and you can't sign in to any Apple services."

Also note "What to do after [or before] you change your Apple ID [email address] or password". Click here --> https://support.apple.com/HT204071 - "After you change your Apple ID email address or password, you might need to update your sign-in information with any Apple services you're using." - Or if you're seeing persistent disabled messages or repeated requests for the password to your previous Apple ID.

If you cannot resolve it yourself try one of these contact methods:

- Click here --> https://support.apple.com/choose-country-region/media-services Select your country, then a product.

- Contact Apple for help with Apple ID account security - https://support.apple.com/HT204169

- Contact Apple for support and service - "See a list of Apple phone numbers around the world." - https://support.apple.com/HT201232

If you really mean the phone itself is disabled -->

Read the Apple Support document about what to do "If you forgot the passcode on your iPhone, or your iPhone is disabled". Click here --> http://support.apple.com/HT204306 - Also has links for what to do for an iPad or an iPod touch.