False advertising and struggling to get a refund

I placed an order and paid for a food processor on 20 May and when I placed the order it showed that the item was in stock.

Did not get any communication from Yuppiechef for more then a week and then decided to look on my account. On my account it then said that the item I ordered is out of stock and that I should contact the customer service department to choose a different product.

I then logged a call with them via email to have the money refunded as I do not want anything else and wanted that specific product. Still did not hear anything from Yuppiechef.

I then tried to call their customer service number with no answer and also no response.

I received an email today from them stating that the item is out of stock and that they cannot get more stock of the item. The email also stated that I need to contact customer service to get a voucher with them or choose a different item from them.

All I want is my money back as they are not able to provide to me what they advertised and what I paid for and I am struggling to get a response from them.

When I looked at the website today the product is now indicated as out of stock and they have increased the price by around 18%.

My view is that if you cannot provide what I paid for you should refund me and not force me to take something else that I don't want from your site.