Bulb Credit

I have £500 credit from signing up friends yet bulb is gonna take money from my bank. How do I use my bulb credit instead?

Yes they will continue to take the monthly DD.
Use the help button to get info on how to transfer back to your bank.

I have £500 credit from signing up friends yet bulb is gonna take money from my bank. How do I use my bulb credit instead?

You can ask for a refund of your credit or for example you can reduce your Direct Debit down to the minimum £5 per month until you have used up your credit. Re dicing my DD payment was my preferred option when I had a significant credit.