Poor service

More than a month that I've been waiting for installation of the WIFI. I moved house, was advised to cancel my service but when I move into the house, just call and we will setup the WIFI at the new residence. To my shock and horror, my entire account was cancelled so I had to sign up as a new client. Did that, but there was an active line here and no one can explain to me why is that my problem. Do a second line so I can have WIFI. I even know that the previous tenant owes their service provider, which has nothing to do with me. It's been 6 weeks and still no WIFI. Everytime I phone in I get a brand new story. I have had it