Dear aspirant

There is nothing much you can do if you fail your interned exam.

You can prepare and reappear for the supplementary exam and pass your intermediate exam. You can reappear next year also if you need more time to prepartion for intermediate exam.

Without passing your intermediate exam you can't go for any graduate courses and most of the job eligibility is intermediate passed candidates.

So you must reappear and try to pass the exam

Hope this helps you

Best wishes!!