Can't help with your issue, but it prompts me to relate one recent experience I had.
I was looking at blenders and found one at a lower price than most for that model at AO. Thought about spending more than I intended for a short while, then decided to go for it. Put it in the "basket", checked it, and the price had gone up considerably, immediately. I checked the item again, it was the same price I'd expected. I phoned, explained, was asked if I could get a screen capture, which I could, and was told to e-mail CS with it and ask if they'd honour the price at which it was offered.
I did and they wrote back saying they couldn't see the picture sent and could I send it as an attachment. The obvious conclusion was that they intended to honour the price if I did, as otherwise why ask to see it again ? So I sent it as a separate attachment; and they then replied that they weren't interested in honouring the stated price anyway.
So why mess me about ? Told them it was their loss and bought elsewhere. I know where I won't be buying the range cooker, the American fridge/freezer, nor the dishwasher later this year then.