Diamond customer, and unable to take advantage of a cheap internet deal since I AM AN EXISTING CUSTOMER!!

As per this URL, I could get 1GIG of internet at $50 per month with a price guarantee for 5 years. Yet when I click on it as a signed in user it turns to $85. So I called the call center, and was told its only for NEW USERS and old users are exempt. Being that it was a work day I did not argue and said okay change my existing $90 1GB plan to the $85 1 GB plan.

This morning a friend tells me that he told Comcast he wants to disconnect since he gets to save $40 per month (just like me), and Comcast gave him the $50 offer instead of disconnecting him. It reminds me of the bullies in school, if you stand up to them they will back off.

Back to my query, I am a 19 year customer of Comcast with 4 mobile connections attached, who does not want to disrupt the existing connection, please explain to me why I CANNOT have this saving in such harsh economic conditions?

Thanks

[Edited: "Personal Information”]