My energy supplier went bust a few months ago and I was transferred to British Gas. I was told several times to keep paying my direct debit to my old company, which I have done and can see it there in my account (nearly £700 now). I know that eventually the money in that account will be transferred to BG but that could take months, and surely BG are going to want paying before then. I can't afford to keep paying my old direct debit AND cover the new bills in the meantime.
Should I cancel the old DD or will this cause problems later on?