sleeping enough why is there still eyebags and dark ring

Maybe it isn't to do with the amount of sleep that you have, but the quality of sleep. If you are stressed then you may not be sleeping very deeply or having bad dreams. it might be worth you trying some relaxation before bed and seeing if that helps you sleep. Also make sure you are eating high energy foods including fruit, vegetables and complex carbohydrates rather than sugar snacks.

You could be getting a restless sleep. Your best sleep in when you are in rem sleep you may not be getting there or you may be wakening up too much during the night.

I think more sleep is not good for heakth at all.I think you should rather consult a doctor for it.