Q: for payment cant we use a debit mastercard

Hi gargshivi63,

While the accepted forms of payment vary by country, the following article provides the best information:

iTunes Store: Accepted forms of payment

http://support.apple.com/kb/HT5552

Alternatively, you may be able to purchase iTunes Gift Cards at local retailers, and redeem them on your account:

iTunes Store: How to redeem a code

http://support.apple.com/kb/HT1574

Thanks,

Matt M.