False advertising

I ordered good via there site on the 23rd Nov it was a very good deal paid for it and received a order number till today i did not hear anything from them i checked up and now they say there is no stock and they will need to cancel the order in the meantime black Friday has passed where i could have bought the same product at a reduced price as what they want to charge me now which i think it is shocking they advertised the product they should give me the product or the same type of product at the same price