Out of control line jitter

I've had this issue as well. I had a tech come out to our home on Saturday. He told me that the issue was at the tap, and all of the service requests he has been completing since the shelter-in-place has started has overloaded their system. He said there was nothing they (the contracted technicians) could do about it, that it was on Cox's end and their decision to fix or not. I spoke with technical support prior to the technician coming out to our home, and she mentioned NOTHING of this being a wide-spread problem... I suppose the technician that came out to our home did because he is contracted, not a direct employee of Cox... nevertheless, he essentially told me there was nothing he could do about the problem unless Cox decided to fix the issue from the top.