Do you have a link to this promo? I can’t find anything like it.
Then this definitely has nothing to do with Equifax, because Equifax would not have received the new card number so quickly.
This actually happened to me a few years ago, it was a Chase Business card. I kept getting fraudulent charges on newly replaced cards even though I used them once or not at all. One such replacement card had unauthorized charges posted before I even received that card in the mail. I had to replace the card 4 or 5 times within 2-3 months and Chase removed all unauthorized charges, but it was very bizarre. The only time charges might be forwarded to new cards is in case of recurring charges, like a cable or cell phone bill, because the card issuers inform the billers of the new account numbers. In my case they were not recurring charges, just new charges from different places.