Unhappy customer (Poor service)

It's been 3 weeks now, my extra view is not working due to errors 143-0. I phoned customer care several times, they always sent commands which only works for a day. They advised me to take it in for check up which I did. The was no faulty on both decoders. The cut the story short. The installer changed the cables, only worked for a day. He said the faulty is on your side guys. Please help. I spent more than my monthly subscription just to call you. I'm paying service which I don't get, I feel like you ****med me.