As a side note...this will show up on your billing statement as NTR*ACOPTIMUMCS.COM and just for everyone's information, they bill out of Cyprus and Switzerland. Think twice before you use your card online...otherwise somebody in Cyprus or Switzerland might have your number. That doesn't seem safe...does it?!
You need to call your card company and have your card cancelled if they haven't tried to contact you already. This is not a legitimate business and they will keep withdrawing money from your account whether it is or isn't there to withdraw. Of course they won't answer the phone, because it isn't a real business. This is a scam that is causing customers and their banks tons of money right now.
LOL...I agree with the comment before me...I, too, work at Citi...unfortunately it does happen - it's the computer systems though, not the person on the phone's fault. Our computer systems are stupid sometimes - automatic updates, even if NOTHING is changed, registers as an "address change" and triggers a fraud alert which then prompts the letter to be sent out. Sometimes, it's a legitimate change - like maybe the last four digits of a zip code changed with the USPS and it automatically updated in our system, prompting the letter and fraud alert - but nine times out of ten it's absolutely nothing and I advise our customers so long as they can verify all recent activity to please disregard the letter and that it was a mistake on our end.
