Invalid Charge Method - Frustrating Loop!

I have one card I use in all marketplaces, none of them have any issue, however FRANCE keeps rejecting the card.

I get the usual copy paste text from SS about expiry date, address, name etc etc - but there is no issue with that (else ALL other marketplaces would also reject it)

When linking the card, I do get charged the temporary hold, which later drops off, so this shows it does work. However within seconds my French account gets blocked, and I'm met with invalid charge method message.

If i put in a different card, it will activate, but then SS respond with 'there is no issue' because the account is working.

To troubleshoot, they tell me to link the card, which only deactivates my account and then they send me the copy paste regular points which are nonsense at this point, there is clearly an issue in the backend of the french marketplace.

The say the card needs to remain linked in order for them to continue troubleshooting and as a result I have had to leave my account in deactivated status indefinately while I simply receive 'we are working on your request' messages in a case I cannot respond to.

The card works in EVERY OTHER MARKETPLACE as a charge method.

Cruically I can reactivate my account (Which I desperately want to do, as im losing sales) by linking another card, but this is a headache having to use a different card and not have all accounts unified, as well as this will just result in Seller Support circling on 'everything is fine, we cant detect any issues, your account works' messages, and then pointing me back to link the card and deactivate your account in order to troubleshoot.

Pure madness, and no urgency to resolve, simply 'deactivate and wait'. Anyone else faced such an issue?

A little help? @Sarah_Amzn @Winston_Amazon @Julia_Amzn @Julia_Amazon