New customer, new SIM, can't get registered (just getting the "Oops" message
I’m a new customer with a new (physical) SIM trying to get registered and logged into the app and / or website. The SIM is working fine I can make / receive calls and access the internet. However… whenever I try to register using the app or website, I get as far as the phone number / name / date-of birth bit and then get the “Oops there was an error, please try again” message. I’ve tried again and again over multiple hours, but it’s still not working. Can you advise?