Update: I finally got through to customer service and the issue was a declined charge from my credit card. I did the voucher thing so that my service could be restored which took a few hours, and cost me an extra $15.
Unfortunately, they told me I cannot update my credit card, or pay it as a bill from my bank account, or log in to my self service account now and will have to pay with a voucher this same way every time. Even though PM is pretty cheap, this is likely to lead me to switching providers. I'm also not happy that they didn't notify me that there was a payment issue, and I was without service for an unknown amount of time (which caused some friends and family to panic when I couldn't be reached, which is the only way I found out)
Logging in each time to check my messages was also an incredible hassle, as they would send a 2 factor authentication code to my phone (which obviously I couldn't receive!), before letting me select an option to send it to my email. Every time. And if I had clicked on view message from my email on my phone, well, then I had to close off the app, log back in through a browser, and do it all over again. and logging in through a browser would take me to a help section that said my phone was hacked (which it turned out, it wasn't).
A very painful and weird process
