Customer-owned DOCSIS 3.1 modem capped at 200 Mbps on a 1 Gig plan

Today I activated a customer-owned DOCSIS 3.1 modem, the Hitron CODA56, which is specifically recommended on Xfinity Device Info page for my service. The modem is online, but I’m capped at ~200 Mbps download. I’m on a 1 Gig plan.

Chat and IVR, which are not helpful, will NOT allow Agent. I need the modem reprovisioned and the correct bootfile pushed, as my new CODA56 has been provisioned to wrong 200 Mbps bootfile on 1G plan despite activation and repeated resets. Thanks.