You need a lot more hubs if you are applying only with your HubPages account. 20 hubs is a minimum. If you are from India, you will have to wait longer too; those are Google's rules, not HubPages' rules.
Several things that will help you get an Adsense account faster are having well- written hubs with images and a variety of capsules to make the content more interesting and engaging. If you are not a native English speaker, I highly suggest that you get a native English speaker to edit your articles.
There are also faster ways to get an Adsense account without using HubPages. Good luck!