You need to restart between each repair to see if Windows 7 starts. It may not take 3 repairs.
If this fails, boot back into Command Line to type:
SEL VOL * (replace * with Windows 7 volume #)
Boot Win8 or Windows 7 installer to run a rescue install, when it starts boot into your old Windows 7 install, set it Default with no Boot menu in Control Panel>System>Advanced Options>Startup Settings. Then in Disk Mgmt make sure your old Windows 7 partition is marked System Active, delete the rescue partition.
If you want to reinstall Win8, I have an exact replica Windows 7 start menu to replace the crApptastic Button Wall: Ex7ForW8