Close my account with cricket from the UK

Hello!

So I bought a cricket phone while I was in the US (because they wouldn’t let me just get a SIM) to use while I was there. Unfortunately on returning to the UK, I thought I would be able to easily log in online and close my account. Not so.

SMS seems to be the only way to confirm an account and manage a phone number but of course I can’t recieve SMS outside the USA.

I tried turning on WIFI calling to see if that would help, but of course when I toggled it on, I just recieved an error message saying I didn’t have permission to access WiFi calling on “this server”

I just want to close the account so I don’t get charged for another month in 3 days.

Any advice on how to work around this would be welcomed.