When start bulb

Hello I already put the bulb gass card and electricity key but it looks that I still don’t use your service. Maybe it’s because I top up the electricity key before the date my contract should start with bulb company. Maybe I need a new card and key to make it work?

This help:
https://help.bulb.co.uk/hc/en-us/search?utf8=✓&query=transferring+with+a+key+card