purchase issues

I'm trying purchase the Nano X. When I click complete purchase I'll get a pop-up that asks if I would like to save my info into Google Pay to make faster purchases. I have clicked No thanks and then my payment is declined.

I contacted support and their reply was Use a different browser or a different payment method.

Why is that. Do they not support purchases from google chrome? Do they not support purchases from a Master Card bankcard.

I have the funds

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purchase issues