Lag from 7pm-3am GMT +10

So this is a continuum of my last thread from a while ago. The basic story is that i get lag (internet lag not graphical lag) From 7 till 3 am it starts off slight then gets worse and worse as time goes on. By nine the lag stops me casting skills and stops monsters moving for around 10 seconds then it goes back to moving. This never DC's me though. It's not my internet as far as i can tell, my speeds are fine and no other online game suffers at these times. One weird quirk of this is that only some characters have this problem, mainly my mains (Archmage, Aran, Sair) but my mules have no lag problems at all.

I was playing around on wireshark, during the lag i get a lot of bad packets popping up:

 Spoiler

This has been going on for this entire year pretty much, it's infuriating because theres nothing i know that can help it.

I used to have issues during peak hours in my neighborhood. I am at a very busy junction in the city and it has multiple people
that are plugged into the same spot. When we got fed up with the lag and d/c's and stuff we called mediacom our cable provider to
come take a look since we couldn't figure it out. Turned out someone had illegally hooked up to the cable internet junction box and were
literally leeching all of the neighborhood's bandwith because they were operating without limiters on their illegal hookup.

As soon as mediacom disconnected them and made sure limiters were in place it all went back to tip top performance. I only mention this
because your story sounds very familiar to that even down to the loss of packets.