Ajio Online Application - Products ordered and paid for are not delivered

Ajio has taken the order requests but failed to deliver multiple orders. Only * out of ** orders placed are delivered and rest of them have been cancelled from Ajio side without notifying the customer about the cancel. And now they want customer to place orders newly. This issue is happening with Ajio multiple times. Customers are placing orders when Ajio has announced sale. Ajio will take orders from customers and later cancel it from their end without notifying customers and they want customers to raise orders newly when the products price have gone high.