Cannot purchase subscription because of "Card decline" error from stripe

I'm trying to purchase the lifetime subscription to improve my laravel skills. I've been waiting for a year to purchase this. I'm from India so this price difference definitely helps when looking from ppp standpoint. But I'm getting this issue (Your card has been declined) when I finally try to utilize the coupon.

I can't paste the screenshots here because of the limitations. But I've tried with two different cards (one credit and one debit). Note that I've just purchased GreatFrontend subscription just now.

Let me know how can I make the best use of this black friday with laracast.

Thank you.