signal come and goes now off

For the past 3 weeks my Top Tv signal comes and goes every evening, then some channels work and the ones I want to watch don't work. I have called the call centre numerous times. I have worked through all the frequencies with them on the phone. Each time the steps I'm given are exactly the same as the previous times<br> this only goes to show that these frequencies are been read by the person helping me.I was told that my dish is not aligned and the RF cable is touching something in the decoder, so I got a installer out to check this out only to be told that there is nothing wrong with the dish or the RF cable.<br> Last night at 9 Pm all the channels disappeared so what now!<br> This morning there is a bmail stating that they have technical problems with some of the channels, WHAT <br> I beg to differ they have technical problems with all the channels<br> Now all of a sudden my decoder gives a message that the smart card is not authorised<br> Top Tv you should really get your act together, I'm sick of paying for a rotten service and call centre people who are not trained to do technical work it cost me money to get an installer out because your call centre staff do not know what they are doing.