Internet is working on the supplied router, there is no problem with the service.
If you are going to start mixing and matching internet services around like adding getflix to the connection and it doesnt work, you either need to troubleshoot it yourself or employ someone to do it for you. Expecting an internet access provider to provide anything more than internet access (which is working on their supplied equipment) at no cost to you is IMO unreasonable. Its like the old days where people expected the provider to configure and support email on all the stupid crap third party email programs that existed and get all angry when they installed a now 4th party virus scanner that broke their email.
This is all beyond the support that it is reasonable to get on a low cost best effort non managed internet connection.