Credit

I’m a bit confused I have switched to bulb on prepayment meters as I prefer and always had prepayment meters with British gas . The problem my gas gas still got£78 Credit still on asked bulb if I put my bulb gas card in will I loose the credit bulb said yes .phoned British gas they said I want a refund back they said i dont need one as as bulb took over it just stays on my meter . so I’m so confused can some one help

I'm a bit confused I have switched to bulb on prepayment meters as I prefer and always had prepayment meters with British gas . The problem my gas gas still got£78 Credit still on asked bulb if I put my bulb gas card in will I loose the credit bulb said yes .phoned British gas they said I want a refund back they said i dont need one as as bulb took over it just stays on my meter . so I'm so confused can some one help

It looks as if British Gas is correct, please see this Bulb article: The first time you use your top up (prepayment) key or card – Bulb It appears that it is credit on electric meter which is not carried forward.