Delete www root file

Hi, if someone could help me with this it would be great, I am new to this and have deleted the www root file which I think I need to upload files to do they will show on my website. I have tried to remake the folder however I am having no luck. If some one could let me know how I could do this or reset it back to as it was when I very forested logged in that would be great

Regards

Ben

Your should contact your webhosting provider.