After that incident happened with my cellphone, I was able to reach Visa immediately. They have a 24-hour hotline to report fraud. Why is it not the same for the telco companies? I even tried calling the consumer line, which is 24 hours but they don't have access to my business information.
If you possess financially or personally sensitive information, you should have some form of access to a 24-hour hotline to report that and to block that so it can't go further.