The way to do that on Verizon is the smart family feature. If that's what you signed up for, you should know how to use it or else your account wouldn't have it -- assuming you're the account owner. If the brother is the account owner, time to get your own account.
If these restrictions were from a 3rd party app, can't help there.
Hello Roxiedg, we're happy to hep you find out what is happening with the phone. If you don't have an app it can be that he set up the Smart Family service https://www.verizon.com/support/verizon-smart-family-faqs/ Is she able to call you? Are you in the same account?