Netgear messed up. My modem (CM1000) has the same default MAC address as another modem

1. we're the public forum. we're not support. Not much we can do.

2. Threatening legal action is literally against the terms and conditions of the forum. direct from the terms of service: 

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3. netgear doesnt' have a cm7500

4. Having the same mac wouldn't cause "drops in my internet quality". It wouldn't work as they wouldn't be able to add it to your account. 

5. If you recently bought it, return it. 

6. maybe its a different issue you're having and that's why their trying to charge you. If it was truly a hardware issue and you were within warranty, you can rma it. 

7. Do you have a screen snip of your cable connections page and the modem logs? mabye its a line issue causing your speeds to drop.