Poor form for online customers

Likely the risk of being an online store but I had placed an order for a new Philips 5000 series shaver which came in at R1326 vs R1799 elsewhere. Made payment but only to hear that their supplier was out of stock and my order cancelled. Looking at their website again - prices have been increased in line with the going rate and item in stock. Contract law generally is offer and acceptance but grey area here in cancelling. Cannot recommend this store owing to this unscrupulous behaviour