Your service has been disconnected

I've been having trouble for 3 days with the issue of my internet keeps disconnecting.   For 10 and a half years, not this level of service interruption.   Usually for an hour or so and then all goes back to normal.   Now, I've chatted with 3 techs and all said the same thing.   It might be trouble with my wiring or maybe the device of my modem or wifi.  Not so, I've set this new modem and router up for 2 weeks and no problems.  Just 3 days ago, I got disconnected and thought it was weather related.   I waiting patiently for this to subside.   I turned my router and modem off then back on.   All was normal, for about 2 hours, it would drop and I would do this a few times.   Yesterday, I checked my xfinity account and it displays my old modem/router as my connection.   So I chatted with an agent and had him changed it which worked.   For about an hour.   Then it disconnected and shows my internet service is disconnected.   I contacted another tech and same thing.   Worked for an hour and again it happened.   What I did notice is when they got my modem back on, it shows in my account my internet and payment plan.  Along with how much speed is in that plan.  When its disconnected, that information disappears and is replaced with your internet service has been disconnected and when I clicked on users.   ( this is all done on my phone) I see that my account has been deactivated.   So I can't add or change the users on my account. B so I turned it off the entire night.   I checked the status early morning and found my internet is on.  When I woke up out of bed, I turned it on and it worked for about 1 hour and a half.   Then, it just stopped working.  I checked my status and again it disconnected.   I spoke to another tech agent and same story.   Got my internet restored and again another hour and bam.  This is so frustrating.   Fix this issue.  It's not the cable, it's your service.   The cables are working fine and are brand new