Now there's a surprise. Who'd have thought it!
Well, the only letter we've had from Fleur is one advising us that we might notice minor changes to our direct debit records. Nothing whatsoever about the amount we will actually be paying etc.
As said above, I contacted you regarding the email starting Dear Customer via your website, and received a reply from you. The email address I used was the same as the one you've given above, except that it was to enquiries, not complaints.
As you have taken the trouble to post here, I'll send you a copy of the generic email I received (plus the not very satisfactory response I got in response to the fact that it was generic), rather than pasting it on here which was my first reaction.
I'm going to do that right away, as this is clearly not the place to go into more detail.
(BTW, the 'enquiries' email address is also the one that I used to email Fleur again yesterday, though as yet I've had no reply).