Cannot access my account\out of control bill

Can’t access my account, and I’m being charged $100+ dollars a month when I originally signed up for just WiFi at about $40 a month.

I spoke to a “live agent” last month that promised to set my bill back to the original $40 a month, and fix the $100+ charge for January, but I received a phone call today saying my coupon for 50% off is expiring and I need to “call now” to keep it…

I have screen shots of said conversation with the “live agent” that I plan on brining to me bank for a charge back against you guys 

edit: during a “live chat” it will now ask me to sign in, which will then cause it to say an error message and send me to the “live chat” again to sign in. I’ve been stuck in this loop trying each different option it presents just to be sent back to the live chat over and over…

edit 2: it’s very odd how I can type in my address, choose a brand new bundle and set up, get to all the way to check out. But if I type in my address and say I already live there and sign in to view my bill and plan it says “oops something went wrong speak to the live chat”

edit 3: I can still not access any information about my account, my email and password are both correct. The live agents ask for my full name and street address and then just stop responding after they send that “thanks for sharing” copy and paste message. I want my services cancelled, and I will be doing charge backs on my bank account. I’m giving you all notices on that right now, completely absurd that I can’t even see what I’m paying for. I don’t know the speed or how much it should even cost, because I can’t get in to view any of that information. This is ridiculous. I won’t even entertain the idea that it might be my devices acting up, because I can post on this dumb forum and literally every other site in the world is working besides the sign in feature on this xfinity site.