Activating Volt benefits

A family member in the same household has taken out a pay monthly contract with O2.

We have attempted to follow the guidance below with both the My Virgin Media and O2 apps, but are unable to find a way to activate the benefits as mentioned. 

“If the accounts in the household are in different names, you can activate your Volt benefits in My Virgin Media”

Also, I’ve noticed that the County is missing from my Virgin Media address details. 

Can I please get support activating the Volt benefits