Missing Channels From TWCTV Roku App - TWC TV and Apps

I get less than half of the channels listed as available on the TWCTV app at https://www.timewarnercable.com/content/dam/residential/pdfs/apps/twctv/TWCTV_Channel_List.pdf .

The app is missing channels ABC, CBS, NBC, Fox, CW, CMT Music, Ion, MeTV, (All) Music Choice, RetroTV, just to name a few.

I've spent hours on the phone with tech support and had 2 service calls, one of which resulted in the tech disconnecting my modem/router and installing a TWC-owned modem/router, which seems to be costing me ~$15/mo, even though I never had any other internet trouble except with the TWCTV app!

I did spend another hour+ talking to tech support last night, which FINALLY resulted in a ticket # and a promise to escellate the issue. But who knows how long that will take, and whether or not it will result in a fix!

This is SO frustrating, especially when I returned all of my digital adapters in favor of a Roku on each of the 4 additional TVs in our house. Only 1 TV has a DVR cable box.

This question is about "Missing Channels From TWCTV Roku App", with Time Warner Cable TV and apps.