I have recently bought dishtv hd connection and now two transponders are getting 0% signal and two transponders are getting very low signal around 40% due to which the channels are glitchy. The dishtv technician visited twice to fix it but he can't. When i contact dishtv they fix my appointment with the same technician again and again. And that person even comes only after i call him 5-6 times. What am I supposed to do now.