Changing Sim only new contract to an Esim (without access to the sim)

[Ruby30]

Hi there, i have recently bought a sim only new contract and was hoping to be immediately on an esim, and unfortunately got sent a sim to my home.  I am unable to access the sim for a while due to being abroad for work currently and when i go to change my sim to esim i need access to the sim in order to get verification. Is there any other way to do this, i have tried to call the sky help number but due to being abroad it isn't working/ will charge me the more i call them.