Oh why...Come back speeds!!

Hey guys
I hope there are any other Canadians.

So recently there was construction going on in my basement, and one of the construction guys accidentally killed the modem and the router.

Before I was getting around 50 down/10 up, but after this I was able to get speeds upto 250 down and 20 up. It was really cool, and my 100 Mbps LAN cables were getting bottleneck.

However, 10 days later the basement and the whole house had to have the whole power cut off. The speeds are back to 50/10 down :*(

I looked online and want to be able to use TFTP or whatever methods there is so that I can get those speeds back. However, I couldn't follow the guides (snmpwalk not working, etc)

Can someone work me through this process of unlocking my modem? It's a DCM 475 modem.

I may be able help pay via Eth if you can help me get this going ^_^
First time posting here, please go easy on me >.<

Thank You!

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