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If someone challenges my self-esteem or insults me, then I will try to find out why it happened. I want to know first whether I have a mistake against him that I do not know. If there is my fault with him, then I will try to apologize.

If I have no fault with him, then I meet him to ask him why he is doing things that challenge my self-esteem, I will try to remind him not to do that again.

If after that he is still doing it, then I will report him to law enforcers, eg village leaders, police or justice. If this is not a response from them, I will reply in a way alone, the term eye eyed. The strategy can vary, which is important to make him kapok.

if someone is challenging you and you are simply looking at them is not the proper way of dealing to your self respect according to my opinion i would simply accept this challenge whatever point he is challenging me and i would never go against him but i will learn something new from that challenge and simply solve the problem.
This is the way to deal with any type of challenge because there is nothing in going against him just we have to go in between him not against him and break down his challenge