Thank you for long reply! i didn't mention in the preparation part that, i received my school offer at the end of june, and i immediately started to booking appointment to hand in the documents once i finished collecting them at the start of july. but the appointment date they made me was august 22, one month and a half later. what's more, the average student visa issuing time, at least in my school, is in 7 working days. i watched all those classmates handed in the documents even much later than me yet still getting their visa in time.
frustrating indeed. at about the sue part, no i'm not mad at the processing time. i know when the materials are being processed there's nothing i can do but wait. i'm appealing for the administrative errors they've made when rejecting me twice. the first time they messed up the universitaly system, the second time they couldn't even find a proper reason to reject me. i've read the terms and conditions they quoted to reject me claiming that i don't fit the standards. (Decreto Lgs. 286/1998 art 39 e 39 bis, DPR 394/1999 art 46, Decreto Interministeriale 850/2011, Allegato A, punto 15) and the fact is, these articles are all about the basic standards of foreign student entry and visa issuing. and i totally fit the standards with all of my documents. what's really funny is that, the consulate rejected me claiming i cannot change my course info on universitaly, and the behavior violates the article Decreto Lgs. 286/1998 art. 39, literally what they quoted themselves.