Bad Network Coverage

I have been having bad network coverages issues for the past 6 months, last year the network was fine. I logged a case june this year, a techi was sent and saw the problem, I can't even go on the net at times I get miss calls outa the blue, I don't get any feed back as to whether they gonna sort out the issue or I need to port my number like other customers in the area. The affected numbers are *** and ***. The case number is ***7, every time when I call I get a different story!! Please don't call me on the affected numbers my alternative number is ***.