T-Mobile US Pre-paid eSIM purchase via app error 505

I just attempted to purchase a prepaid eSIM via the official T-Mobile Prepaid eSIM US app, and after entering the mail address, selected plan, payment card information, I got the following error:

 “There is an issue completing your order…..(error 505) (cart id ...)”

Now I’m stuck and don’t know:

1. Whether the payment really went through as I’m using a company card.
2. Whether the eSIM plan has been properly installed on my device.
3. Whether I’d be able to activate it once I land in the US (I’ve not travelled yet but wanted to purchase ahead of travel time and activate it upon arrival).

Can you help me solve this situation?

Thank you.