How is it possible to be this bad?

I was moving house on the 6th of April so I thought I would be pro-active and inform Supersonic well in advance. I place an order on the 6th of March to move my equipment. When it came to D day (6th April) I called to see when the installation at the new premises will take place. No definitive answer but they seemed to create a new order. I kept calling but all I got was "someone will call you back" No information about when the installation would take place. Fed up I decided to change ISP to Vodacom. I phoned Supersonic to cancel. They said they would process it. The agent did not ask why I wanted to cancel. Anyway I am happy I switched to Vodacom. Their router arrived a day later. I am all set. Phone Vodacom to ask when the ONT installation will take place. "We can't load our order until Supersonic cancel your subscription". Noooooo! I am still at the mercy of this excuse for a company. Nearly two weeks since I cancelled my account and I have spent 2000 Rand on data.