iPad activation failed
I got a second hand iPad yesterday for my studies (iPad air 2 16GB Wi-Fi with OS version 15.8.3) When i tried to sign in to my apple ID i made a while ago using my windows laptop, it said "Maximum number of free accounts reached on this device) and then I tried to erase the data of the iPad through settings but it didn't worked, so I connected to iTunes on my windows laptop to restore and update . But now the iPad says "Can't activate iPad because activation server cannot be reached", and at the same time on iTunes on desktop said "This iPad"iPad" cannot be activated because the activation information could not obtain from the device" and asks to enter a SIM when the iPad doesn't even have a sim slot. Anyone had this issue before and knows how to fix? I'm quite worried because this is the first ever iPad I got. I contacted an apple advisor too and she asked me to use recovery mode but the error didn't solved at all