How Do I Change My Plan to Lower My Bill

I try calling, and the only way I can ever get a human being is to say "Cancel Comcast" and then, boy oh boy, there's someone right there.  The phone line insists on sending texts (I have NO cell phone, never had one, never will) and it just goes back and forth until I scream in the receiver "CANCEL COMCAST" and by then my blood pressure is so high my head aches and I can't keep doing that. 

I try clicking on the stuff to do it, and as the first screen shows, there are three options: CHANGE PLAN, SUPPORT, and MY ACCOUNT.  I tried all three.  Screenshot 1 shows the topics available, I circled them in red.  Screenshot 2 is the Access Denied I get every time I click on CHANGE PLAN (YES, I am logged in as I couldn't even watch TV if I weren't).  Screenshot 3 is the Access Denied I get every time I click on MY ACCOUNT.  And screenshot 4 is what I get when I click on SUPPORT, a big beautiful "Hi Joseph, we're here to help" with a completely blank screen underneath. 

The boss is unhappy at the price hike and wants to get rid of things to lower the bill.  How can I do that when I can't seem to get help over the phone.  And I can't seem to do anything on the website (if you're going to recommend I change browsers, then that's the same as recommending I change TV providers, because I AM NOT SWITCHING FROM FIREFOX.  PERIOD. 

Do you want this account or not???

EDIT: Well I added two screenshots with the Access Denied from MY ACCOUNT and CHANGE PLAN, but for whatever reason only one shows.  What a website.