i need help unlocking my apple ID. I reset my password but I am still unable to download applications.

Does it say why you cannot download applications?

What to do after you change your Apple ID email address or password - 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 that you're using.

contact iTunes Support. Scroll to the bottom of the page in the 2nd link.

iTunes Support

iTunes Support – world wide

If the earlier information does not provide a solution:

If you cannot resolve it yourself:

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