Really slow broadband all of a sudden.

Question

Chatted to a bloke from BT both through the online chat and again on the phone about this issue and he said he would change some settings his end to try and increase our broadband speed. The broadband used to be fine, could stream videos just fine, browse the internet without any issues then all of a sudden the speed has dropped to below 1mbps (582kbps using the speedtester.bt.com).
The speedtester itself said that an "acceptable" speed should be between 600kb-7.5mbps. Frankly that is a bit of a joke as 600kbps is near enough where it is currently and even the 3G signal my iPhone is getting here loads web pages faster.
Just to reiterate, the speed was fine up until about 4-5 days ago.
Wiring inside house hasn't changed, don't have any extension sockets using homehub 2.0.
ADSL line status
Connection information
Line state
Connected
Connection time
0 days, 0:26:40
Downstream
8,064 Kbps
Upstream
448 Kbps
ADSL settings
VPI/VCI
0/38
Type
PPPoA
Modulation
ITU-T G.992.1
Latency type
Interleaved
Noise margin (Down/Up)
15.6 dB / 31.0 dB
Line attenuation (Down/Up)
21.0 dB / 11.0 dB
Output power (Down/Up)
19.8 dBm / 12.1 dBm
Loss of Framing (Local)
0
Loss of Signal (Local)
0
Loss of Power (Local)
0
FEC Errors (Down/Up)
0 / 0
CRC Errors (Down/Up)
0 / N/A
HEC Errors (Down/Up)
N/A / 0
Error Seconds (Local)
0
Please Help!!!

Answer 1

After no luck whatsoever with the people on the online chat help system and after 3 calls to the customer help number I have finally been told that there is nothing wrong with my houses wiring, router etc etc. But the problem seems to lie (after the fourth line test in as many days) on the line between my house and the exchange!!!
How is it the other people that conducted line tests couldn't see that or did they not both and just spout some BS at me as they couldn't be bothered to actually get to the bottom of this issue?! Perplexes me how the first 3 line tests I was kept on the line whilst they carried out the test but on the fourth time of asking I was told that whilst a line test was underway I should not use the landline at all...
Pretty shoddy customer service to me from the first bunch of people I spoke to. Not happy.
Now I have been told that I will have to wait another 2-3 days until and engineer examines the line and possibly even longer after that until the problem gets fixed and its been broken for over a week now!! What are we BT customers actually paying for?!