I have never received any notification before the card was deleted. I had just opened the site and got the notification, and saw that my card had been deleted. If they update and notify users, then they could send a notification email, but they have not sent me any email, even though they have not sent any email after deleting the card, and also they reject payment on their site after deletion of the card. And finally, have they blocked my account so that I can't provide any more information?
After your case, they became much more up-to-date regarding notifications. Almost every time I log in, I get some new information. They also updated their ToS so that the card can be removed if it has a negative balance for a long time.