service unusable due to congestion

I'm connected to the Galston exchange and just did a test at speedtest.telstra.com.

739ms latency. 1.46Mbps download. 0.50Mpbs upload. Jitter 161ms. Packet loss -1%.

aceroute to speedtest.telstra.com (203.39.12.216), 64 hops max, 52 byte packets
1 dsldevice (10.1.1.254) 2.583 ms 1.301 ms 1.398 ms
2 * * *
3 144.130.209.210 (144.130.209.210) 568.073 ms 816.691 ms 821.154 ms
4 bundle-ether14.chw-core10.sydney.telstra.net (203.50.11.100) 450.564 ms 753.517 ms 928.590 ms
5 bundle-ether8.exi-core10.melbourne.telstra.net (203.50.11.125) 821.405 ms 160.347 ms 117.000 ms
6 tengigabitethernet8-1.lon55.melbourne.telstra.net (203.50.80.65) 104.772 ms 479.804 ms 328.924 ms
7 telstr793.lnk.telstra.net (165.228.205.114) 172.742 ms 294.151 ms 168.005 ms
8 203.39.12.216 (203.39.12.216) 195.897 ms !Z 758.071 ms !Z 818.718 ms !Z

My DSL sync rate is 11.82Mbps down and 0.94Mbps up.

I spoke with Telstra support on Saturday and my line has tested fine; as I knew it was.

Performance is fine during early hours but Telstra obviously has serious congestion issues during peak times. I've spoken with friends who are also connected to Galston exchange and they are suffering the same performance issues.

I tried to explain this to Telstra support but they denied any congestion in the network.

When is Telstra going to fix these congestions issues? It's become a major issue over the last month or so.