SBG7600AC2, constantly rebooting on its own

We got a the new modem through amazon, it is the SBG7600AC2, the device worked fine the first day however it started to frequently resets on its own. We thought maybe the cords were the problem and had it replace. We have also moved the device in a more open space. We contacted amazon about it and they sent a replacement but that one also had problems…. the first one had intermittent issues and the second one had docsis health issues and wouldn’t even connect. I had talked to my service provider about it. Is there any ways to fix the intermittent issues or docsis health issues so i can return one of them at least??