horrible price difference- is the an option for refund difference?

As I stated in an earlier post I renewed my subscription for Norton INTERNET Security for another year. Did so through the Norton renewal process.  Through this process I paid $79.99 US  plus tax. The very next day I get an email from Norton saying my subscription is about to expire ( on that day ) and they offer me renewal for 1 year up to 3 PCs for $29.00 US. The very next day. So if I waited less than 24 hours I would have saved $60. This isn't really right. Is there a Norton telephone number I can call to have them refund the difference? I don't want to chat online.