Need help with HBO Max

I have tried to contact cox support multiple times for help with accessing the HBO Max app. No one at Cox helped and I’m paying for a service that I’m unable to access for more than two months.

Need help since when trying to log in through provider, I select cox and then the following message appears “There was an unexpected internal error. Please try again.” 

For TWO MONTHS! 

Also internet is pretty bad. Keep paying for the service since it is the only one in the area but looking forward to canceling everything due to the lack of customer services and quality of the products and services