We're using the Cox Panoramic Wifi gateway as it initially came with the unit (as it does all units here) but was taken by the previous tenant. Upon contacting both our leasing office and our local Cox team, we were told the replacement and installation of the gateway would be free as it's standard to every unit.
The only reason we had a technician come out was because customer service let us know they weren't able to support. It was at this point they stated over the phone it would be free for assessment and we'd only be charged at the point in which the technician provides a service, which he did not and he confirmed verbally and after following up on this matter.
If "customer education" is chargeable then I'd hope over-the-phone service would be better equipped to answer questions and support. Yes, we asked neighbors and our on-site maintenance before relying on customer service.