how to subscribe itunes in india by debit card

Not all debit cards seem to work with iTunes. In India (not sure if this is still the case) some do (or did) work : Re: can i download from itunes using debit card in india ?

Do you have another card that you could try ?

For a card to have a chance of being accepted it needs to be registered to the same name and address (including format and spacing etc) that you have on your iTunes account, and have been issued by a bank in the country where you are (and therefore the country which is on your iTunes account).

We cannot help you from here except to advise you that very few debit cards are acceptable in India. To check the credit cards that are acceptable, go to Account > View your account > Sign in > click on Edit payment details > and a set of illustrations will show you what you can use.