Terrible packet loss and jitter.

Has been 3 months and still no one can answer my question on this. Have been gaming recently and noticed a terrible lag I thought it was temporary, but after 3 months it only got worse. Called 2 techs and both had the same sorry excuse. Looking for a true answer. Tried 6 different routers, even getting the Panoramic gateway. Can't even finish the post because it says I've gone "offline". There has to be something that has to be done. This is the only high speed internet in my area, please anything that can help...