Credit card limits when filling up the tank

I used my Amex at the local Shell station and swiped it twice to fill up.... NOW my Amex will no longer work at any of the local Shell stations. It tells me to contact the card issuer. The Shell clerk tells me the card is no good and to contact the issuer. I've called AMEX numerous times and they don't show it as being denied by Shell so the card is being stopped by Shell even though they claim it isn't. Cards works fine every where else so I doubt it is an issue with the card. I can use my wife's Amex card at the Shell but even though it is linked to the same account it has it's own card number.

I am going to have to get a new card to fix the problem.

I am cautious about swiping a card twice now.


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