Misrepresentation of goods

On 17/11/17 I went to the shop to buy a SMEG stove and cooker which I signed a quote for, paid for and expect delivery thereof today. Yesterday I was told that the colour which I was promised is no longer available and I compromised for alternative, today I'm told that I was quoted on a wrong brand?? Who's fault is that, and again Drickers from the store is calling to tell me that I must be calm about this whole this and just top up the difference, am I being taken for granted? Am I being treated like a customer here? I don't think so, not of the managers with authority is even calling to acknowledge the mistake and try and resolve this at managerial level? I was specific about the brand I want and paid what was quoted to me, don't expect me to know your models. I still have a SMEG quote and expect the brand to be delivered . Wrong figures are not my problem