[Connectivity] Comcast problems. At wits end.

I've also posed my sob story to Comcat Direct, hoping to hear back. I’ve always had relatively positive experiences with Comcast until now. I recently moved to Columbia, Maryland. As of the move, I’ve begun working from home, as my office is now over two hours away in Wilmington, Delaware. I’ve had issues since day one. I used the same Motorola SB6121 modem we’ve owned for two years from my old apartment. We never had a problem with it there, and our problems began as soon as we moved here. Because of this, I am doubtful that the modem is the problem. Initially, my modem would not connect at all, despite working with tech support. A technician was dispatched the next day. Before he arrived, my modem eventually connected, but kept rebooting frequently. The logs in the modem indicated that it was experiencing a T4 timeout due to signal problems. The technician replaced the connector at the “tap” and removed a splitter that I did not need, and the problem was gone for two days. On the third day, I experienced the reboots due to T4 timeouts again. I monitored this problem for one week, and it occurred a few times every single day, between 1pm and 5pm. We had a second technician dispatched who acknowledged that he was seeing periodic problems out at the tap and informed me that they’ve been having problems in the are with this same issue. He also told me that this apartment complex in particular was having problems. He said that maintenance would examine remedy the problem later that day, and that I should call back the following day if the issues persisted. They did. I called back and got another appointment scheduled for today. Most of the time, my levels looked like this: Upstream Power Levels: 42 - 45 dBmV Downstream Power Levels: around 7 dBmV Signal to Noise Ratio: 37 dB In the afternoon, when this problem was occurring, my levels looked like this: Upstream Power Levels: 47 - 51 dBmV Downstream Power Levels: around 3 dBmV Signal to Noise Ratio: 37 dB Today, the technician showed up, and I began informing him of the history on the ticket. He interrupted me to inform me that his logs from Comcast’s side show no drops or timeouts. I informed him , that regardless of what his logs said, the problem was occurring every day. I work from home, and I sit here watching the modem reboot time and time again. I told him that when I check the signal levels and logs in my modem, they indicate signal problem, but he was very dismissive of this. The technician was very nonchalant throughout his entire visit, and seemed to care very little about my problems. When I informed him that the last tech confirmed that he saw signal problems at the tap, I was told in a very matter of fact way that “that last guy might have been telling you stories.” I can not fathom how this is even remotely acceptable. I work in IT, and this is not the way you treat a customer who is unable to perform their job due to technical problems. After essentially implying that he could replace some cables and the wall jack, and no more, he went to work. He replaced the jack, and two cables. We then called (855) PREWIRE to get a new line run from the tab to my apartment this Wednesday. He only agreed to this after I pleaded with him that I couldn't await another three weeks for this to get fixed, as it is affecting my work. He also said that he would have maintenance monitor the connection during the hours when I usually have problems (1-5pm), but said I wouldn't get a call with results, so frankly I fail to see the point. Within minutes of the technician leaving at around 11am, I noticed that not only was the connection not fixed, it had gotten far worse. I’m not dropping packets constantly, my modem is rebooting due to T4 timeouts about every 15 minutes, and I can watch the Uncorrectable Codewords count up constantly on the modem’s signal screen. I called support again and after making quite a stink (I really hate being that guy, but I don’t know what else to do here), I was told that the ticket had been escalated, and that I would receive a call back within one hour. That has now come and gone with no call. My connection is practically unusable right now. I’m tethering my computer to my phone just to send this message. Does anyone have any insight or guidance. I can't keep waiting around for this to get resolved. Thanks for everyone's help in advance and sorry for the wall of text. UPDATE: Just to be sure, I've now replaced the modem with a new SB6141. As I suspected, upon finishing the provisioning with Comcast, the problems started right back up again.