Question for a friend (yes, really!)

Her son lost a Samsung D900; she contacted her insurance company who
said it wasn't covered. She bought him a new phone - same model - to
replace it, on a Fresh contract, from Carphone Warehouse. Then the
insurance company changed its mind, and she's now received another
phone in the post.

She went back to CPW to try to return the phone she'd purchased there
and to cancel the contract. They had told her, when she bought it,
that she could cancel the contract within 14 days (that time will be
up on Monday). However when she went back, they said that there would
be a cancellation charge of £400. I suspect this is really them
charging her for the phone, since she'd be cancelling the contract,
but it doesn't sound like they were very clear and she got the
impression it was Fresh charging this.

So she now has two Samsung D900s, one on a contract (18 months) with
Fresh (which is apparently costing of £20/month, but doesn't include
any calls?) and the other... I'm not sure if it's on a contract or
payg.

What she wants to do is sell one of them to cover part of the cost of
paying the contract every month. CPW suggested she sell it on ebay,
but she has no account on ebay and I wondered if selling it there
would be worth it even if she did.

Anyone have any ideas about how she can recoup some of her money, or
extricate herself from this? Yes, she knows she's not been too savvy
about all of this, and yes, I've made her promise not to buy a phone
again without taking a grown-up ;-)

TIA