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I just switched modems from the one I was leasing to one I own, but I believe they may have messed up the numbers for my advertised speeds. Currently I'm getting 3.9 Mbps (477 kB/s). And I'm paying for 5/512, What should I do call back and switch back, or call back and get them to upload my 5/512 file again?

Motorola SURFboard SB5120
Downstream     Value
Frequency     687000000 Hz
Signal to Noise Ratio    36 dB
QAM    QAM256
Network Access Control Object    ON
Power Level    3 dBmV 

Upstream    Value
Channel ID    1
Frequency    30000000 Hz
Ranging Service ID    913
Symbol Rate    2.560 Msym/s
Power Level    46 dBmV

No tweaks using Cablenut or TCP Optimizer.