Painfully slow broadband (plus losing dial tone)

Question

Hi everyone,
On Saturday night our broadband connection plummeted from a usual download speed of 200kbps (download speed, not connection) to what is now struggling to hit 15-20kbps. Along with the much slower broadband our phone has also been cutting out/losing dial tone/going incredibly quiet.
We called BT last night, told them the issues and after 45 minutes we we're told that the line was fine, it was an issue on our end and nothing else would be done.
Well this morning I spent a couple of hours messing around, connecting the router and phone to the master socket using multiple new ADSL filters, multiple other cables, everything I can think of and nothing has helped. It isn't just a WIFI issue either because although we use a few WIFI systems (android smartphone, Xbox 360 and a laptop) my main PC is connected to the router via an ethernet cable.
I'm lost for ideas though - I'm disabled and I'm unable to get out of the house often (trying to sort out the router this morning has even left me with a fair deal of pain) so the internet is my connection to the outside world via gaming and stuff, but since Saturday night I've been unable to do pretty much anything due to this issue and I'm just lost so please, if anyone can help I would appreciate any advice I can get right now.
This is the info from the connection section of the hubs page:
ADSL Line Status
Connection information
Line state:
Connected
Connection time:
0 day, 00:29:56
Downstream:
416 Kbps
Upstream:
448 Kbps
  ADSL settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.1 Annex A
Latency type:
Interleaved
Noise margin (Down/Up):
13.3 dB / 10.0 dB
Line attenuation (Down/Up):
61.0 dB / 31.5 dB
Output power (Down/Up):
14.8 dBm / 11.9 dBm
FEC Events (Down/Up):
55 / 14
CRC Events (Down/Up):
33 / 0
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
0 / 0
Loss of Power (Local/Remote):
0 / 0
Loss of Link (Remote):
0
HEC Errors (Down/Up):
22 / 0
Error Seconds (Local/Remote):
0 / 0

Answer 1

Thanks a lot for the help so far, however I'm still having problems ...
So we did as you advised and reported the fault, then a couple of days ago (wednesday night-thursday) the phone line improved, as did the routers connection to the internet. The router is now connecting at at about 1.8mbps and the quiet line test on the phone is completely silent ... however my download speed hasn't seen any kind of improvement at all, even before all this rain and flood warning.
Could this be a problem with the router itself? Like I said originally, I've got multiple devices connected both wirelessly and wired (multiple cables tested) and according to the router and BTs speedtest it's connected perfectly, so I'm now just wondering if it could be a problem with the router not relaying the data fast enough?
It's been close to a week since this started so I'm just completely clueless - for someone who has problems leaving the house and connecting to the outside world by other means it's been a really tough week.
Thanks again for the help anyway.
By the way, my routers new stats are:
Connection information
Line state:
Connected
Connection time:
0 day, 10:54:14
Downstream:
1,824 Kbps
Upstream:
448 Kbps
(Short connection time because I restarted the router to see if the rain maintenance may have helped)
  ADSL settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.1 Annex A
Latency type:
Interleaved
Noise margin (Down/Up):
14.4 dB / 13.0 dB
Line attenuation (Down/Up):
57.0 dB / 31.5 dB
Output power (Down/Up):
17.9 dBm / 11.9 dBm
FEC Events (Down/Up):
79660 / 29
CRC Events (Down/Up):
66 / 2
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
0 / 0
Loss of Power (Local/Remote):
0 / 0
Loss of Link (Remote):
0
HEC Errors (Down/Up):
138 / 3
Error Seconds (Local/Remote):
0 / 0