I received a notice saying that my Norton Antivirus program was ending, so I did renew it. I was charged $74.96, which was on April 26th. Shortly thereafter I went into the hospital for heart surgery and was away for awhile. When I got my Master Card bill I see that I was charged again on May 16th. I do not wish to pay for this twice, if indeed this is a legitimate program. What can I do about it?