Timely, this ....
I pay my mobile phone bills (like most of my bills) each month by direct bank transfer (cos I'm closely related to Scrooge, and I like to check them before I pay them, having been ripped off too many times before : also, I once had just over £11K lifted from my account "in error", and it took me weeks to get it back, so I don't like DD). Therefore, O2 get the money paid directly into their account, with no "admin" required.
I've just noticed that on the bottom of the bills I'm now being charged a fee for "Direct Debit Opt-Out" ! Bl**dy outrageous, I've never "opted out" of anything, and even if I had, they have still been getting their dosh on exactly the same day, month after month, for years now without having to lift an administrative finger !
Grumpy old git hat firmly on, I shall be on the dog and bone this morning. I'm quite sure it won't do any good, but ....