Horrible Business etiquette

I recently went onto the Avo Shop online platform to buy a Amazon Kindle for my spouse, it was being sold at a discount. I purchased the product and my order was processed(purchase amount deducted from my account), I received confirmation of order with delivery date. A day later, I get a call from a representative stating that they cancelled my order because the was an error in the price that was advertised for the product, on their platform! I don't see why me as a consumer should bare the consequences of their inadequacies