I did graduation only and from last three years I am working in a bank but not at all satisfied there. I am really confused what to do should go for education or try job somewhere else but till now know what to do.

Why don't you start with doing some research to see what type of jobs are out there. A good way to research what's out there is to start looking for jobs. Once you see what jobs are available, then you can see if you have the necessary education and experience to suit that job. If you don't, then you will have a better idea on what you need to study or what type of job experience you need for that particular job.