Hi @worthing88 thanks for your post although I'm sorry to hear of your concerns raised.
Unfortunately, as @enlli has advised it's not possible for us to block a number from being dialled or texted I'm afraid.
As you've touched on, you can block numbers from the handset itself but this is something that you can quite easily unblock yourself as you've mentioned!
Sorry I can't be of any further assistance to you but at least provide you with a concrete answer.
Many thanks
Tom_W