What can you do when someone has already made up their mind not to understand you?

So no matter if you are defending yourself by trying to explain things - they had already made up their mind that no matter what you say, they will stand their ground even in the face of being wrong.
I have decided to go silent 😶 on them and save myself and my dignity.
Some people just cannot admit when THEY are wrong and make YOU the problem. It's called projection. They are projecting what is wrong with them and making a switch to make YOU sound like the problem when in reality they are screwed up.
What can you do when someone has already made up their mind not to understand you?
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