Need urgent help regarding SNU admission offer.

They gave me 3rd preference, which is Mechanical Engineering which I think is absolutely unfair.

I got 85% in 12th boards, 87% in 10th. I had a score of 1380 in the SAT (750 math) and 89.98%ile in JEE Mains. My SNUSAT + APT went really well as well (gave it on 17th April). I applied in mid Feb and was part of Round 1 Phase 3 initially via SAT.

And if my academic stats aren't good enough for ECE, here are my co-curriculars since these fuckers say that they follow a holistic admission process.

Winner of 3 national-level science fairs, 1 international online science/research competition, 2 district-level science fairs, 1 research paper publication, 2 college hackathons won, school student council head, and 2 tech internships.

They said in the offer letter that I got Mech engg through SNUSAT. And no mention of any financial aid or scholarship (I applied for the vice-chancellor via SNUSAT).

What should I do? I want at least ECE in SNU, and idts my profile was bad enough for getting the 3rd preference.