Locked out of iPhone, says to connect with iTunes but won't let me

My friend locked me out of my phone one too many times now I can't get in it and it says to connect with iTunes. My other friends and I googled how to do this and we thought we knew how but when we try that method it doesn't work! We're super frustrated and I want to get back in my phone lol Please help me, it would be greatly appreciated. Please explain in detail so we can understand how to do this (neither one of us are technology smart.

Thank you,
Two frustrated girls

Added (1). We've tried plugging it in with iTunes and everything but it's still not working!

Plug your ipod into your computer. Then if that still doesn't let you. Backup and restore.

If you have a iTunes account what steps do you need to do?