Stuck on ADSL Max

Question

We re-contracted to get upgraded to ADSL 2+, but two days after the regrade, the line stats from the BT HomeHub say we are still on ADSL Max (Modulation: G.992.1 Annex A)... Noise margin 17.6dB.
Spoke to first line tech support earlier, who first said the modulation was fixed in the BT HomeHub and couldn't be altered, and then said the modulation type changes automatically after the ten day training period.
I'm sorry, but I'm not convinced about either story. Can anyone confirm how we get the line upgraded to ADSL 2+?

Answer 1

Ok, now back from a wonderful break - and the line stats here are: 
Line state:
Connected
Connection time:
0 days, 03:59:46
Downstream:
1.969 Mbps
Upstream:
448 Kbps
ADSL Settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.1 Annex A
Latency type:
Interleaved
Noise margin (Down/Up):
16.4 dB / 6.0 dB
Line attenuation (Down/Up):
53.6 dB / 31.5 dB
Output power (Down/Up):
18.3 dBm / 12.4 dBm
FEC Events (Down/Up):
205 / 38
CRC Events (Down/Up):
0 / 0
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):
0 / 0
Error Seconds (Local/Remote):
66 / 392