I want to buy something on a app and it won’t let me

be more specific please

If your iTunes & App Store account is disabled the you must contact iTunes Support to fix it

sometimes it happens after you request a refund/charge back or payment method deactivation

that thing you want to buy is a In-App purchase? or any purchase at all?

https://www.apple.com/support/itunes/contact/index.html <--- iTunes contact information

https://support.apple.com/contact <--- more contact options

https://support.apple.com/en-us/HT201232 <--- support phone numbers according to your region

Regards.

Hi quinae193! I would love to help you with your question, but would you mind being a tad more specific? Is your device giving you an error message, and if so, what does it say?

Tyler Nichols