my site was hacked and can′t login

My site was hacked two days ago. I was sent a notice by my webhost and at my site had a picture by the hackers with their info.

Now I have replaced my files through cPanel with previous ones (before the hacking took place). As you can see in my blog the first three posts only contain info from database, not from the files. I think it must mean that my files were placed succesfully and database works, although 3 posts are missing.

But one BIG problem remains. I can′t login as admin. I have changed my user_pass at phpAdmin several times and tried to send me new password but all I get is shake in the login.php. I have also tried to create a new user in phpAdmin but without luck, I can′t give it required permissions.

Also I have tried to disable my theme (pagelines which caused this in the beginning, my webhost told) but after renaming theme in File Manager I don′t even get a login box.

My site is https://www.middlegrays.com
Please let me know if there′s a way to get to dashboard! I am grateful for all the help.