Locked out of permissions

Hi,

I am a complete newbie when it comes to cPanel and as such, while having a look at the "Change Permissions" tab in "File Manager" managed to change the permissions and lock myself out of my own site.

Now, when I go into File Manager, the Download, Delete, Rename, Edit, Code Editor, HTML Editor, Change Permissions, View, Extract and Compress icons are all greyed out.

How can I change the permissions back to what they were and regain access to my site if I no longer have access to the Change Permissions icon?

Thanks for taking the time to look at this and let me know if you need any other info