Hi, I was working in the education industry for 3 months. I requested a holiday for 7 days, but my seniors did not approve. They did not even provide me with the joining/appointment letter. Instead, they asked for a one-month notice for resignation, rather than granting me the 7 days off. I disagreed with their decision and did not give any notice as I did not have a joining letter. This led to conflicts, and the company instructed me to leave without paying my 18 days' salary. What should I do? Can anyone offer me some suggestions?