Can you please follow the below mentioned steps to execute the payments in Amazon
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Amazon typically only accepts domestic cards, but by changing the billing address to a foreign country, the payment may be routed through different gateways and have a better chance of being accepted.

please update the "Billing Address" on Amazon to a any US address and try processing the payment 3 to 4 times until it goes through?
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We're working on a permanent fix for this.