1. The writ jurisdiction of high court does not encroach upon disputed question of act. It has its effect on the malfeasance or misfeasance of public authorities. If IT authorities is not taking action on your complaint on this issue alone the writ petition will not lie.
2. You will have t file a civil suit for this and not the writ petition.
3. Yes, it can be done.
4. No, for this both civil suit and criminal case will lie.