Hi sorry to hear about your problem it sound like a reverse path problem .it could be on the drop cable to your houde or in the house .If it a problem in the street then other people should be affected .Most service techs dnt have a meter to test the reverse but if the box i take it you have a samsung box ? and the modem go off to gether it is a signal problem .The tech should of got networks involved to test the reverse in the street and at your house .Hope i have shread a bit of light to your problem
