This makes no sense and customer service is clueless on fixing issue?

The other day, I accidentally left my phone at a T-Mobile store. After driving for about an hour, I realized my mistake, but by then, the store had already closed for the day. In a pinch, I pulled out my iPad Air 5th generation from my bag and opened the Digits app, hoping to regain access to my phone number.

I had successfully logged into the app about a week ago, so I expected everything to work smoothly. However, as soon as I tried to sign in, the screen displayed a message saying, "Please log in to your account to register and use the app." I entered my credentials, watched the loading symbol spin, and then was met with a frustrating prompt: "We are having some difficulties. Please sign in again. If this error persists, contact T-Mobile care at 611 and report the issue." 

I tried to log in four times, only to face the same problem each time. Frustrated, I decided to delete the app and reinstall it, but that didn’t solve the issue either. Without my phone, making a call to T-Mobile wasn't an option, so I turned to live chat for assistance. Unfortunately, the wait time was long, and when I finally connected with an agent, they seemed completely oblivious to my dilemma.

I explained my situation, emphasizing that I wanted help to regain access to the Digits feature so I could make calls. The agent replied that the app wouldn't allow me to make calls, which left me bewildered. I tried to clarify, mentioning that I usually have my iPad linked to my phone number, allowing both devices to ring when receiving a call. They had no response to my explanation, which was incredibly disappointing.

To make matters worse, I encountered another issue when trying to access my T-Mobile account through my web browser. I could log in using my email and password just fine, but when I attempted to sign in on the T-Mobile app, it rejected my password. 

Everything seems to be malfunctioning lately, and I'm running into roadblocks trying to access my phone number as a backup for emergencies since it’s linked to my iPad. I really need a resolution to all this confusion so I can use my devices as intended.