Joining with Smart Prepay Meter


I joined Bulb with electricity (prepay) and gas (monthly debit). I keep receiving emails regarding a prepay key but on my meter (was recently changed by previous supplier) there’s no longer a slot for a prepay key, and all top ups were done through their app.

I understand that when I switched over to Bulb I’d have to top up in advance, essentially become a monthly debit similar to gas, which is fine.

Today (16/9) is switch day, and I’m unable to report electricity meter readings - gas side of things seems to be okay, however.

The smart meter from previous supplier continues to lower in credit throughout the day so I can only assume they are still currently my supplier - does this sound like there is a potential problem?

Appreciate any help.