Masterclass App

Before purchasing a subscription to Masterclass, checked on my TV box to make sure the app was available. According to Xfinity the app is available, but not on my box. I reached out to support, and they said they'd need to send me an updated box. Meanwhile, I spent over $120 on the subscription, received the box today, and the app is not there. Can someone please tell me if you actually have the Masterclass app or not? Using chat is useless, the phone number just sends me in circles. Can I speak to a human?