I changed my admin name and got locked out my super admin dashboard

I changed my admin name and got locked out my super admin dashboard. I went into my data base and followed the instructions on this page https://premium.wpmudev.org/blog/daily-tip-how-to-change-your-wordpress-admin-username/ and now when i log in i do not have the access to the whole site. to make matters worse i have forced easy blogger on do I'm really restricted.