Terrible service and no after sales support.

Hans showed up to install my ADSL line. He left a huge mess and said something is till wrong on the box, and he'll be back. He never came back. My telephone line didn't work for a week and my supposedly 4 MB line reaches a high speed of 232 Kbs!!! I am working from home and it is impossible to work like this. I've logged a support case 3 times. Every time I get an sms saying that the issue has been resolved and then I have to call the call centre again (which takes minimum 1 hour) to open another ticket. 3rd Ticket closed and the issue still remains. In the meantime I get billed!