Poor service

Bought a dining set online and unfortunately my order was cancelled because they didn't have stock. They send me an email letting me know that the order was cancelled. They don't give a reason why my order is cancelled. I had to call to find out why it was cancelled. They cancelled my order but they still have not refunded me my money. they say I have to wait for 7 to 10 working days for me to receive my money. Why do I have to wait for so many days.... It's November and I am chasing black Friday specials.... Now I have to wait for them as if I did something wrong... I want my money leroy merlin