Aap ki galti hai, jab exams khatam hogaye toh aapne itna late kyu resume kiya? u shud inform your late resume in advance. company articles ke aaram-pharmaishon pe nahi chalti.
You should understand the responsibility first and accept the gratitude of your principal that he is not removing you. May be the pressure from the senior upon him will held you for a transfer.
just saying sorry doesn't work in this corporate world. u'll hv to pay the price.
You will be transferred only on the poor conduct.
Reasons other than misconduct won't be taken by the principal
Henceforth you should try not to create any situtation which acts against you.