Received an e-mail from WorldSIM that my SIM would be deactived in 7 days
because I had not topped off.  I topped off the next day and get message
that "SIM is not registered" and "No Service."  Is WorldSIM currently in the
USA?  I quess I need to contact my credit card company to challenge the top
up charge as the SIM cannot access a system and the SIM displays
'unregistered SIM'.

Does anyone know anything about WorldSIM?

Thank you for any help.