It (retention) is done by the school authority in time. Why the school is silent? Of course, you are getting your salary. After completion of two years continuous and satisfactory service, school authority ought to retained the post by the DIS(SE). Now you contact to your DI office.
They are unable to retain the post due to lack of student availability to the corresponding subject.
Weather I may use my M.L or, if I take a continuous leave due to any personal reason it will be treated as a without pay???