The first category should go to the local human resources and social security bureau for work-related injury identification within 1 year to lay the foundation for subsequent treatment. As for whether it is disfigured or not, we can't be sure until the injury is healed. With the conclusion of industrial injury appraisal, you can claim compensation after the fact that plastic surgery is needed. Since you have insurance, you should confirm the types of insurance now. In your case, should you file a claim?

Of course, the work-related injury appraisal cannot be completed before the start of school. However, this is your chance to develop your abilities. Get a lawyer.

The factory's statement is unreasonable. You can write receipts instead of IOUs. If they don't agree, you can tell them that you wrote a receipt, and they can ask for it later, just like an IOU. As a college student, whether for this matter or for the future, you should study some laws, focusing on the Regulations on Work-related Injury Insurance. Instead of talking on paper, it is better to consult the above departments directly.