Service interrupted after being told it won't be

I'd like to know where I can file a complaint and to look into my current contract length as I will be looking into other providers as soon as my contract expires.

I called yesterday, finally got through the AI to speak to a human and confirmed that my payment date was okay and that I wasn't due to have my service canceled. Was told everything was all clear. Woke up this morning to no service. When I again finally connected to a human to ask why, I was told that the system had updated and now everything is shut off until I make the payment. I explained that I asked about this specific situation yesterday and was reassured that everything was fine and was basically told that that was yesterday and now the system has updated and as I'm now 55 days due I have to pay now to have service back. I feel lied to yet again, as last time I was in a similar situation I was told the half payment I could afford would be enough to restore service, but after paying I was told I had to pay the rest. I understand having the service interrupted if I don't pay, but being told yesterday that I was all set with the payment date the AI allowed me to set and then having my service disconnected today feels like I was lied to.

To add to that, I feel I've been listed to not speak to as when I tried calling again, the AI said I can't even speak to a representative until I paid. I can't speak to a representative through the Xfinity chat either, as it just keeps repeatedly giving me a popup of my bill and a pay now button. This is absolutely ridiculous and appalling that I have to try to get answers from a public forum for something that never should've happened.

Edited for some typos and to add:

I would also now like to know who to contact to request copies of the calls from yesterday and today. I believe that after the misinformation and deception, on top of the levels of anxiety and distress from not even being able to contact Xfinity to attempt to resolve this in a civil manner, I should look into taking this matter to court. You shouldn't be able to run a company and have a "customer support team" that consists mainly of an AI loop to throw a costumer with complaints into, and completely cut them off from contacting a human with human reason when actual consequences fall on said costumer from misinformation from the company's representative. I will not just shrug it off this time as I am once again facing issues from Xfinity saying one thing to me, and doing another. I reiterate that I know I'm at fault for being behind on my bill, but being told the wrong dates to pay by and that my scheduled payment was adequate for service continuation only to have my service turned off is wrong, a blatant lie, and being told that it was caused by a system update in less than 24 hours seems to be a slap in the face to get me to just let it go and pay now if I wish to have the service I was already told I would have restored. I do not think I would have much issue with getting a judge to agree that this was misinformation and to help me to break my remaining contract. I am sorry to have to change services after all this time, but I am tired of feeling like human garbage because I fell behind due to family emergencies.