Good luck. I tried to set up a new Dual fuel account on 4th October. They got it wrong and only did Gas so I tried to cancel the account. So far the account has still not been closed despite my many complaints and promises to sort it.
@Marion38 Utilita drives the transfer process, SP already know you have left and they will send a final bill. You can check if you ask SP customer services. 0800 027 0072.