Broadband Slow in peak times & packet loss?

Question

Hi guys,
I've had a number of months of reasonable surfing, but about a week or so ago I started getting problems with my broadband, at first I thought it was just "one of those things" so I left it for a while and when I got up the next day the problem had seemingly vanished. However later that evening the problem re-emerged and the pattern has continued ever since, with it being 'normal' during the day and then incredibly slow in the 'peak' times. I'm on totally unlimited (no useage cap) so I'm not expecting my broadband to be throttled and I haven't made any changes to the setup in the house for a number of months, so interference etc from my own equipment isn't an issue. I've connected my laptop directly to the hub and that had no effect on the problem.
During the daytime we get around 3-5mbps (its still abit lame, but its the best we can get :<), and then in the last few during the evenings those speeds have been being slashed to around 0.3-0.8mbps and at times it just dies on us.
I've been in contact with the helpdesk in india, but I'm at a point where I need some of the friendly mods to help me out as I'm not overly happy with the service on those phone lines with their standard flowchart of "help" where last night I was asked the same question 2/3 times by the same person in the space of 20 minutes :'(
Here's a snapshot of about 2 1/2 hours of 'uptime' during the problem period, the HEC events/ CRC events stats look mindblowingly massive so I suspect they are the symptoms of the underlying problem, the question is what is the underlying problem and how can I get it fixed. I can see alot of other people have been having similar problems - are we all in the same boat, could it be something widespread such as the weather? (I've looked on the status page and our area is apparently ok though)
As always any help would be greatly appreciated
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.1 Annex A
Latency type:
Fast
Noise margin (Down/Up):
6.0 dB / 23.0 dB
Line attenuation (Down/Up):
36.4 dB / 20.0 dB
Output power (Down/Up):
20.0 dBm / 11.9 dBm
FEC Events (Down/Up):
0 / 1715
CRC Events (Down/Up):
309275 / 2527
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
0 / 0
Loss of Power (Local/Remote):
0 / 0
HEC Events (Down/Up):
1138083 / 787
Error Seconds (Local/Remote):
7538 / 2693

Answer 1

I mean this is remarkable, it gets to later on in the night and its literally feels like someone somewhere has flicked a switch somewhere and it's back to being useable, i'll add further results from various points throughout the day tomorrow
00:30
1. Best Effort Test: -provides background information.
Download  Speed
3.69 Mbps
0 Mbps
7.15 Mbps
Max Achievable Speed
 Download speedachieved during the test was - 3.69 Mbps
 For your connection, the acceptable range of speeds is 0.6 Mbps-7.15 Mbps.
 Additional Information:
 Your DSL Connection Rate :4.45 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM)
 IP Profile for your line is - 3.5 Mbps