Site hacked and wordpress wont update

Hey,

Another problem with a wordpress site..

The site has been hacked and I was getting the message An automated WordPress update has failed to complete – please attempt the update again now.

I did this but the same thing keeps happening.

Then I tried to update templates and now all admin pages are showing Briefly unavailable for scheduled maintenance. Check back in a minute.

Its like this for a while now.

I know its hacked because every page has n3enc7ntcxk and my main page just has the text ( No theme )