What is the ruling regarding a woman who became angry because I wore the hijab in the presence of her son, then accused me with false accusations, and is it obligatory to boycott her, given that she is easily provoked and does not accept advice?

The anger, cursing, and insults displayed by the woman because you veiled yourself from her adult son constitute a transgression (fisq) on her part and are impermissible. She ought to thank you for your commitment to Islam. Write her a gentle letter explaining the rulings on hijab, cursing, and the rights of neighbors, seeking assistance from someone knowledgeable. After clarifying the rulings, do not be concerned by what she expresses. Indeed, Allah will reward you for overlooking her offenses. Do not reciprocate evil with evil; rather, forgive and repel [evil] with what is better. Treat her kindly as much as possible. You may refrain from visiting her if you perceive harm, but it is not permissible to cease greeting her with salaam for more than three days. The rights of the neighbor are emphasized.