Wtf man this is so frustrating. How long should I even wait here?

So today I came to this company in Konanakunte Cross area of our city Bangalore in India for the Business Analyst trainee role but goddamnit, the waiting time is too much. It's a walk-in drive basically hiring freshers. Many candidates are there who are in their early to mid 20s and I am 25 so yeah I am freshly done with MBA but other backgrounds like Engineering, BCA and MCA are there too along with MBAs. Also many candidates are Kannada or Telugu speaking South Indians and I am Bengali so most are talking in their regional language among themselves. But honestly the waiting time is what is making me so frustrated. In the walk-in details in my email they said timing is 10 am to 11 am which might be the reporting time but they never mentioned it in detail. After entering, they made us fill the register form with contact details and made us sit in this one room.

But we are sitting here since like 10:07 AM roughly and it's not freaking 12:58 PM(basically 1 PM) and we are still waiting. No rounds have started and they are delaying it. They aren't even communicating properly when it will even freaking start. They are just saying is to sit inside and wait. Even first round didn't start. Like freaking 3 hours of waiting already for real. Some candidates are already leaving but I don't wanna leave now as I want a job really badly so I don't wanna run away from the interview but the long waiting time is making me so frustrated. It's a walk-in but the management is quite bad I guess here. What should I even do?