Quote Originally Posted by Pedro de la Rosa View Post
You'll be paying more in the summer as your consumption will be lower, so the theory is that when you get into the winter that credit balance is chipped away at. Still, there's no way they should hold onto £300. Give them a call or threaten them with the ombudsman.
You can take the whole amount back or part and adjust your payments on a monthly basis. They’ve recently asked me to reduce what I was paying.