BLITZ TELECOM???? What the hell is going on!?

I was originally connected with G-Node but they were bought out by Blitz. Now I am stuck with Blitz Telecom Australia and at first my internet dropped out for a week. Now the internet drops out daily. Ive tried ringing their contact number displayed on their website and all i get is "We regret that the number you have dialed is temporarily out of service." How can i get out of this mess? They overcharge and don't provide me with a reliable broadband service. Is anyone else experiencing this in Australia or the UK and US???