Your ISP generally can only see traffic from your Modems IP, not individual systems behind a router. Direct connect your laptop to the modem and test, the issue could be in your router. OR see below on DOCSYS 3.0 modem if your ISP supports 3.0.
For the last couple of years I was sure my laptop and workstation were being hacked or watched... yeah, I know, no aluminum cone hat here. But on Saturday morning we had a total failure (eeeek). Called Cox and they could not see me so decided to create ticket for a home visit to fix. About an hour later received a call and based on my issue they found there was an outage. I tested and all seemed 'normal'. The tech stated with my service package I should be using a modem with DOCSYS 3.0, my current one had 2.0. Okay, I will go see about it, Cox sells them bla bla bla. Went to BB and got a Moto SB6121, set it up, had Cox activate it and FREAKING WOW.
I may be able to get to the end of the internet now. Ping times always around 30, up and down hanging at 22 / 8. REALLY FOLKS DOCSYS 3.0 IS DaBOMB.