Getting fraud transactions from WooCommerce Stripe Payment

Hello,
I am getting fraud transaction from some days. I am using WooCommerce Stripe Payment Gateway plugin on my website.

Basically our flow is we create an woocommerce order from custom code inside our custom theme.

After creating an order with pending status, we send user to order-pay screen. Their the user will able to see the payment methods used on that website like Stripe Credit Card and PayPal.

Yesterday I have talked to Stripe support team and they told me this:
“It looks like the card testers are obtaining client secrets for Setup and/or Payment Intents, then confirming the Intent with stolen card information. This confirms whether the card is valid, even without a payment.”

Here I have done 2 testing :
1.) from using other WP Theme : Storefront on Staging
I can see the payment intent inside Developer tools -> Network tab [ https://prnt.sc/EpZrecvRyD_n ]

2.) with my custom theme on Production
here also I can see the payment intent inside Developer tools -> Network tab [ https://prnt.sc/VCDplEv6rmY1 ]

So here I want to tell that in both environments I can see the client_secret is getting revealed. So now what to do in this situation to stop fraud transactions. Please help me ASAP.

Thanks