Cannot access my wp-admin

Hi guys, after i installed a bad plugin called (remove wp-login) my entire site immediately crashed. So i went into my ftp and deleted that awful plugin from my plugins folder and my site seemed to work (buddy press) but i noticed when posting nothing will happen and now i cannot even login to my wp-admin or plugin dashboard (500 internal error).

Can anyone please help me before the break of dawn (my users will be loggin back in soon).