A possible bug I found when trying to renew subscription

So, a day ago, ChatGPT stopped charging me and kicked me out of Plus (I still don’t know why), despite having sufficient funds. So, I tried paying on my PC where I originally paid, and it refused my card, or any other card I attempted to use. Yet, when I paid on my phone it allowed it.

So merely I ask: Why did it kick me out originally? And why did it not accept payment on my PC?