Tuning Adapter firmware update (Charter)

My Motorola MTR700 tuning adapter in use with my cablecard/Roamio is firmware version 1.33. TiVo makes it clear you need 1.36 or later for 6 tuners (plus bug fixes). I am 5+ visits in with Charter, and even more phone calls. I have swapped the TA for a new one. No matter what, stays on 1.33. It is activated, and the CC is paired and working fine. They have remotely reset/provisioned it several times.



Most people of course don't even know what a TA is :(



Two friends in the area have 1.37 on theirs.



At my wits end trying to get Charter to sort this out. Any advice?



thanks!