Stuck in UK: Need eSIM activation but cannot receive 2FA verification SMS

Hello,

My physical German O2 SIM card has completely suffered a hardware burnout ("Invalid SIM" on multiple phones) while I am currently traveling in the UK.

I am trying to complete an eSIM replacement swap via my online account to restore my connection. However, the system is forcing a 2FA verification code to my dead mobile number via SMS, making it impossible for me to finish the setup.

I am completely stuck abroad without a working phone line. Could a moderator please reach out to me and help to resolve this.