[SOLVED] Replacment DVR faulty but can't get Comcast to do anything about it

On Saturday September 14th when I tried to watch TV the screen was black. I had no choice but to unplug my DVR and let it restart. Unfortunately,  it went into a boot loop where it would never fully boot. After a while on the Welcome screen it would restart again. It was still trying to restart 12 hours later. I don't remember what model it was but I think it was the same one I got when I switched to X1 in February 2018. Comcast sent out a tech on Monday September 16. He replaced the DVR with a XG1v4-A. This DVR has been a nightmare. Here are some of its problems:

The following is during live viewing on a channel:

• When I rewind to watch what's in the buffer it would stop playback and delete the buffer. Sometimes it gave an error about a communications error.
• Sometimes when I try to rewind the buffer it stops and gives errors. When I hit the Rewind button the error is "Rewind isn't available. This set top box doesn't support it". It gives a similar error for pressing the pause button. I have to restart the DVR to get buffering back.
• Sometimes when I try to rewind and play the buffer the channel freezes. The only way to get the channel back is switch to another channel and then change back to the original channel.
• I have a  DVR and two satellite tuners. These tuners are supposed to have about a 26 minute buffer. One is buffering OK but the other one is not buffering at all. If I hit Rewind or Pause I get the same "Rewind isn't available" error. Even restarting the DVR doesn't fix this problem.

I even have buffer problems when watching a recording

• Sometimes when watching a recording it would stop in the middle of a playback and asked if I want to delete it. It thinks the playback is done no matter how far along it is. One time I had to restart the playback and fast forward to where it left off four times.

I checked my call log and see I have already called Comcast tech support 14 times in the last few days. They only wanted to restart the DVR which never helped. They even sent out a technician a couple days ago (Wednesday) but he was clueless. He said he needed to go outside and check the signal level. It seemed he used that as an excuse for to just leave because I never saw him again.

I have suggested they try to just replace the DVR but they seemed reluctant to do this. They are sending another technician out tomorrow (Saturday). I told them to have him bring another DVR in case he needs to swap it with the one I have. Right now I have no confidence that service call will solve anything.

I was up really late last night trying to document the problems. I even used my phone's camera to record videos while the DVR was malfunctioning. This morning I was woke up by a call from a Comcast agent. He wanted me to check my DVR to see if it was working now. He wouldn't stop with this. I was half-asleep so told him off and hung up on him.

I have been a Comcast customer since 2001 and have never been treated so badly. Is it so hard to get an X1 DVR to work without error? If I don't get this problem resolved I am seriously thinking dumping Comcast next Monday and going with a competitor. I have three other choices with two being fiber. Maybe they will treat me better.

BTW, My old DVR never had problems like this. I was sorry to lose it because I lost the 5 years worth of recording on it. The new DVR only showed the cloud recordings. I assume the lost recording were on the old DVRs hard drive. The DVR used space went from 77% down to 2%.