incorrect fridge delivered and bad customer servic

went to purchase a fridge on the 10th October 2015 to the Joshua doore in Town East London, spoke to the sales lady and advised her which fridge I wanted, they captured the fridge on the system and explained that it will be delivered by Tuesday the 13th October 2015 latest which I agreed too. Tuesday the 1th came and the incorrect fridge was delivered which my mom sent back with the delivery guys. I called Joshua doore and spoke to a lady by the name of Ingrid who said will get back to me as she needs to check what fridge was booked out and correct the error. I had to all repeatedly to speak to Ingrid as she was not keeping me updated with the progress of the fridge. Ingrid eventually called an advised that she will push for everything to be corrected and the fried I paid for and wanted will be delivered the next day. it is now the 14th Oct and I still do not have the fridge, I requested Ingrid to cancel the order and give my money back as I paid cash for the fridge. she advised head office will take 7 days to pay the funds back. I AM NOT HAPPY WITH THAT!!! Joshua doore was quick to take my money now they are hesitating to pay MY MONEY BACK!!!