Deadline extension?

Salam!

COMSATS admission submission deadline for isb campus is 4 August. I'm travelling and I'll be back in Pakistan on 9th august. I have got the admission letter but it requires physical presence because signature, thumb impression, stamp and idk affidavit type things .

I emailed COMSATS administration office few days back and even yesterday as well but no response. They don't pick up phone at all. I have tried gazzilion times

My father asked one of his friend to visit the campus and sumbit my application of deadline extension and idk uncle was confused or wo pata nahi Kya pooch aye hain😭

So I'm really really worried. Idk what to do

Is COMSATS lineant with it?

I can pay the fees ofc with the time limit but sumvittin documents won't be possible since I have them back at home

Plsss if anyone can help?

How do I contact them?