Option 1 : Retry your Payment From Payment history. Click Here
Option 2 : Contact your Paypal Team or Credit Card Provider If your account is valid, International Transaction ON and have enough balance to process a payment.
Option 3 : If you from India, You need to select INR as a currency in your cart.
Option 4 : If all above is ok and still having issue. Feel free to reach our customer support team directly on Facebook Messanger. We are eager to help you.