Willfully ignorant...Of their own will, they ignore facts, sound advice, accurate information and the truth...They are willfully ignorant
Uncooperative?
Non-partisan or independent.
A phylomath.
You could call a snowman who refuses to melt a "resilient snowman" or a "stubborn snowman."
Obstinate.
The trouble that there are sorts of medical terms for someone who is slow learner. A person who is slow to learn maths is dyscalcic, a person slow to learn reading is dyslexic, a person who is slow to learn balance or similar poise is call a dyspraxic. It depends on how easy the skill is to learn, whether the person enjoys doing it and if they practise.
no
call the boss
A mentor is a person who helps others to learn how to access their individual knowing capacities.
Call the police ,guards ,cops what ever it is in your counrty and supply them with a recipt of proof of purchase
Nonjuror
A person who takes in a minor with the parents' permission may face criminal charges. It is best to call the parents or the police if the minor refuses to leave.