Order Placed but then TFG has no stock

Good day, I placed an order on the 29/11/20 for a pair of sneakers and the sale went through as the sneaker showed it was available on the website. I purchased the sneakers as a gift, but to my surprise when I phoned them this morning to find out when the sneakers will be arriving only for the consultant to tell that my order has been cancelled. I did not receive any notification from TFG that they cancelled my order because they over committed themselves. I want to know how it's my problem and what kind of services does TFG offer with no communication at all. I am disgusted at the service I have received from TFG as this is not the first time it's happened to me. I can tell you one thing I will never use TFG's online shopping platform as it's a load of ****.