Why Am I Getting Lousy Service From Net Zero?

I am constantly getting " NOT RESPONDING." WHY? FOR THE LAST YEAR I HAVE HAD NOTHING BUT A HEADACHE FROM YOU GUYS. THE LAST TIME I CALLED THE GUY SAID THAT THE PROBLEM WAS AT MY END. I WOULD THINK THAT YOUR SERVICE ISN'T WORKING THE WAY IT SHOULD BE AND I AM NOT A HAPPY CAMPER. I AM PLANNING ON DROPPING YOU GUYS VERY SOON IF THE PROBLEM ISN'T CORRECTED. I AM NOW RETIRED AND I HAVEN'T GOT MONEY TO THROW AWAY ON SOMETHING THAT DOEN'ST WORK. DO NOT TELL ME TO CALL YOU GUYS BECAUSE I DID THAT THE LAST TIME AND THAR DIDN'T WORK. I WOULD REALLY APRRECIATE IT IF YOU CAN HAVE IT CORRECTED IMMEDIATELY. THANKS.