Are you sure that the e-mail and person you spoke to was from Ancestry?
The email, not 100%, although it certainly appears legit … but of course the possibility of a scam was there from the get go so I was trying to update my card via my Ancestry account info online on the website and I telephoned the number the Ancestry website’s helpbot gave me, a number which tallied with the one generally available online. I didn’t click on any links etc. etc. etc. so I have no reason to think there was an issue.