They don't HAVE to give you anything even if you have an order confirmation or not. If you read websites Order policy's you'll see that nothing is even once an order is confirmed,it has to be verified and processed. There's won't be anything to process since you didn't provide any payment details so they're gonna cancel tha order. It's almost as if it's a fraudulent order and once they see how you guys are ordering 10-500 copies and it's for personal usage rather than a business they're gonna catch on when they see there was no payment method used. There has been plenty of times where tha purchase receives an order confirmation and receives a cancellation email shortly after or tha next day,it's extremely common,Walmart being one of tha main stores that do this
Walmart may do that, but Tesco do not. You need to read up on the chocolate orange incident..