Those issues are cropping up more on your ISP's side of the equation...outside SE's sphere of influence. Need to file support tickets with your ISP to investigate. They are the ones determining your routing into Level3 and Telia, as well as whether you use Level3 or Telia. Your ISP also has the peering agreements with Level3 and Telia, so there may be a way to affect change within those networks as well.