Have not yet been upgraded

I Phoned the 8TH of July Wednesday to upgrade my line from a 2Mbps to a 4Mbps line, I was not yet upgrade almost a week, where i was told it will only take 72 Hours, I am not happy with the service im getting and also what makes it worse is THEY WENT AND DOWNGRADE MY LINE TO A 512KBPS LINE , I phoned in the 13Th July to sort this out, i spoke to a lady on the phone and was GUARANTEED that it is fix and upgraded to a 4Mbps line, I still do not have a 4Mbps line and phoned in today 14th July and the spoke person told me it has not yet been upgraded and is still in the Que .<br> <br> I am not happy with the Service i am getting NOT at all, I also received arrogance and a bad attitude Yesterday(13TH July)