Faulty lines, lies, overcharging

I upgraded my line from 2 megs to 10 meg line speed in March. I was then overcharged and logged a dispute, which has not to this date been resolved, I am still waiting to hear what is happening. <br> <br> I then had a week of faulty lines, both my phone line and my ADSL. After many attempts to have it resolved it finally was restored. 2 weeks later I have the exact same problem, and last Wednesday logged another fault to say my phone line and ADSL were not working properly. On Monday I receive an sms saying my line is working, which it was NOT. I then had to try to get through again which I couldn't do as I could not phone so resorted to Twitter in desperation. Finally yesterday afternoon a technician arrived and fixed the line. Today my internet is down to 0.3, it seems I am softcapped which is impossible as we have lost 2 full weeks of service, and I cannot even purchase more data as your internet site is not working properly! <br> <br> I then call to cancel my line, am left holding for 45 minutes and am then put through to the SALES department when I asked to speak to the accounts department to get a refund for the 10 mg line I have not been able to use and the 2 weeks of lost service!