I have faced an issue with App store.

I have already register my debit Card with app store. For the first time transaction they charge INR 60/- to download a free software.
But when I have try to download a free software from there they are again get the charge INR 60/- 😠😠😟😠

NOW I HAVE A QUERY WHY THEY CHARGE FOR FREE SOFTWARE AGAIN AND AGAIN. IF IN FUTURE I WILL TRY TO PERCHES SOME FREE SOFTWARE FROM THERE THEY WILL CHARGE AGAIN OR WHAT TO DO ?

PLEASE LET ME KNOW ANY ONE THAT WHAT SHOULD I DO???

THANKS,

PALASH