My latest bill was due on 10th April, but not taken and when I now try to access the billing portal. There is an error message, its not available at moment. Also message on my account saying I can't make changes at the moment, I assume this is because I change my calling package during last month.
Hi @wakeman, thanks for getting in touch and I'm sorry to hear you're having billing issues as of recent. I've looked into this for you and although I can't confirming my findings via this channel I've raised a ticket on your account with the information which can be seen here.
I hope this helps.