********* Behavior and false adverti*****t

I ordered my items and paid on the 28 of August, I was first advise that delivery will take place on the 12th of September a day before my delivery the order updates and is moved to the 17th of September. Today i am advised that my order is cancelled due to the product not being in stock, yet the product is still being advertised at a higher price and is now available for immediate delivery.