Is Amazon 'false advertising'? AND don't trust their chat lines ...

This lightning deal for a Cubot X15 (fourth item above) put an earlier model in my basket, the X12. I contacted Amazon via chat - who noted the error - and said:

11:32 PM BST (Amazon rep): It will be automatically changed once this issue solved by our internal team and this is just the error only in the website, so I request you to place this item and you will receive the correct item only.
11:33 PM BST Mr David Callaghan: OK - I'll order it now. Just a mo ...
11:33 PM BST (Amazon rep): Yes, please.
11:34 PM BST Mr David Callaghan: Ordered. Paid. What should I do now?
Order # 999-99999999-99999999
11:35 PM BST (Amazon rep): You will receive the correct item only.

An X12 arrived today - not really that surprising.  However, what was surprising is that the only thing Amazon were prepared to do was give me a voucher for £15 as a 'good will' gesture towards the purchase of the X15, currently £112.99, meaning I would be around £50 light.

Not impressed.

I'll escalate and comment here on how I get on.

What do I want?  An X15 for £54, as agreed on Wed evening.

If anyone has had similar experiences, please comment or tweet me: @dbcallaghan