This is bad luck for you irelandagnes, sorry to hear. We bought our house with the washing machine to be included in the sale. With this, we produced an inventory of Fixtures & fittings which were to be included and the original owners signed this inventory before our purchase as part of the agreement. Unless the make and model were listed on the inventory (if you had one) there is not a great deal you can do. I would however go back onto 'Rightmove, search for the house you have just bought and use the picture of the original washing machine as proof (if you are considering suing the previous owners).
With the shower - Buyer beware, sold as seen I'm afraid, you won't get anything back for that.