No, I don't have your phone number in the order confirmation email (which you call receipt), I just checked. It only includes the order number, the item I purchased with the price, the billing and shipping addresses and your support email address. Furthermore, even if this would have not been a lie and there would actually be a phone number on the "receipt", maybe some of your customers are on the other side of the globe, and having them call you in order to receive the purchased goods is not a reasonable expectation.