Frustrating New iPhone 17 Trade-in Process and Billing Issue

Last week, I talked to two XFinity representatives (one in chat and one on the phone) to change my billing address to the NEW address I'm living in. The chat representative told me the bootfile will take 1 hour. Lo and behold, it was not updated when I checked again a couple hours later.

I called instead, and a phone call representative told me their higher-ups were told and they updated it. The phone call representative also managed to persuade me into a promotion of trading in my old iPhone to the new iPhone 17 with lower monthly billing. I told him I received an email confirmation from XFinity and FedEx that it's going to my OLD address. The rep said, "Don't worry ma'am, it says that on your email but it will go to your new address."

The next day, I received an email notifying me that the package is being shipped from Tennessee to my OLD address, STILL! I called Xfinity again. The woman call representative states that she created a ticket and FedEx should receive it so that it'll be sent to my new address. I called FedEx just in case and the rep said "I am not authorized to check the ticket made. It must be between the sender and FedEx. Please tell the sender to contact us." Hung up. 

Guess what happened the next day? Got an email saying FedEx DELIVERED to my OLD address. 

I call Xfinity.. AGAIN. This last woman representative seemed to be the most cognitive of them all.. and finally someone from the USA. To summarize, she said something along the lines of, "There's two accounts made for you because you changed your billing address and got the new iPhone. My best advice is to ask your neighbors to ship it to you from your old address to your new address. As for your billing address, it has been changed. Just take off paperless billing and it will be mailed to you with the new address." 

Now I'm just waiting for my next billing cycle, hoping that the bill does say my new address. 

I'm so FRUSTRATED with XFinity. How hard is it to change my billing address? Even the banks I use let me change my address at my own time with my own account. No phone calls needed.

XFinity, are you training your representatives well? Are communications being settled to where everyone cognitively understands what they're doing? Finding cheap labor is truly showing. Quality is not there.

There's also the upcoming issue where I'm going to need a return label for my current iPhone and ship it back to Xfinity (if the Trade-in process actually goes through).

Now, am I going to get compensated at all? Is my next billing cycle coming to me with my new address on there? Is there a direct line to an Xfinity representative who has the authority and cognitive ability to help me with all these issues? Please.