no internet

​​ I Have been without internet for 3 weeks and comcast/xfinity won't talk to me every time I call the customer service number the automated machine claims my outage is due to scheduled maintenance and hangs up. when a logged into my xfinity account on my phone my address is listed as "NULL" now and when I talked to the other people in my apartment complex who have comcast none of them are having an issue. I literally live in Downtown Sandy Springs, GA just 20-30 minutes from downtown Atlanta and comcast seems to have randomly turned my internet off for no reason and now won't talk to me. And this is the second time comcast [Edited: " Language"] when I first got my internet set up they billed me for "NEW" equipment and what I got was an outdated modem that was covered in about an inch of dust and looked used, and the reason I know its outdated is that it's the exact same year and model as the one that got cooked back when my house burned down in 2009. When I called and complained about this issue, I got a [Edited: "Inflammatory"] customer service agent that told me that the modem I was given was the only equipment that was available to me and that no matter how much I complained about it turning on and off and causing intermittent internet issues that comcast/xfinity wasn't going to replace it, and two days after that my internet went out and I haven't had internet since and I'm having to use the mobile hotspot on my phone to type this.​ [Edited: "Inflammatory"]