Q: Internet recovery does not work

Hi,

I'm using Macbook Pro (13-inch, middle 2012) El Capitan

I went to the disk utility and erased all the data, then when the macbook startup it gives after a while a file with a question mark

then I restarted it and used the internet recovery.

it show Me the globe turning around for hours then it stops even the trackpad doesn't work and the cursor is not moving

I think the problem is with the internet connection because I get what I said before when I use my home router

(WPA2 security) but in my school router (security type: open, no password) it works and shows a progress indicator but it takes so long to complete

at home I tried to change the router settings but didn't work.

please help me, I need to do my homeworks