my apple id is locked and i can't unlock it cause i can't access my email nor i remember the security questions, what should i do?

if this site can't help you https://support.apple.com/en-us/HT204306

then your only other option are to take your iOS device to an apple store with proof of purchase

and if the iOS device is not as much the issue as the appleID you can make a new appleid and use that with future iOS devices you buy