FORTNITE packet loss again,

I upgraded to the ultimate 300 plan and I was not having packet loss for weeks and now I am getting it again. this is so annoying. I cannot deal with these shenanigans. I have tried everything to fix it, I have not been lucky enough to find a fix. thinking about dropping cox bc this is unacceptable. I want this fixed. it was fine for weeks, so something happened overnight. so fix it .