Password Reset On An Amcrest (Dahua Reseller) NVR?

We bought a few Amcrest NVRs when we first started doing video surveillance (admittedly a mistake). We were woking with their channel salesman and just using CC for purchases and they werent tracking them. I dont have any proof of purchase and they wont/cant help me with out it. I know they have a list of master passwords but when we tried none of them worked.

Does anyone have the list or any other ideas? Otherwise Ill just scrap the NVR, and write it off as a lesson learned.

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