Furthermore, deceptive entertainment service providers may simply switch to using other numbers. Read all user agreements carefully and fully. Don't allow children to surf the Internet unsupervised. Limit the number of people who know the password to go online on your computer. Don't allow anyone to install programs on your computer without your supervision.
Every Web browser has a history folder, a list of all sites visited organized by day.
Usually after 20 days a site is erased from the folder. Since the first time you'll know that you've been a victim of the scam is when you receive your phone bill, you need to be able to search back at least 30 days. You should reset the maximum time for your history folder to at least 30 days if not 45 to help you look back and find out what Web sites were visited on the days the calls were made. Your browser's help folder can give you instructions to make the change. Consider installing monitoring software on your system.