As far as I remember, JCB comes in rupay platinum. Not in classic. Code is RPJ.
Go to branch and fill the debit card form. Mention code "RPJ" at the top. Issuance is 349 I think.
If your account is eligible, it should get applied. Else, you are not eligible.
Once again, visit branch. Nothing is online. You can use "search" button to further research on this. Plenty of posts are available on this same query.