Following cancelling an order because sainsburys informed me that the payment did not go through, the delivery man turned up a few hours later with my order. I told him that I had cancelled the order so he called the office who confirmed that the order had gone through now. I took the delivery and the receipt and noticed that an extra 18 pound had been charged. I questioned this and he told me to call customer service. When I called customer service, they acknowledged the mistake or problem with the system and first tried to give me a voucher for another online order. I told them that I will not be using the service again and wanted a refund of the additional 18 pound I had been charged. I think they are going to refund me but it is not in my account yet. The next day, I received an email to confirm that the order had been cancelled. Note this was after I had accepted and paid. There seems to be serious issues with the online delivery service. I am quite stunned that such a big company can have such fundamental things wrong with their system. This kind of service is not acceptable these days. A big company like Sainsbury's should be able to get something this simple right. The Company needs to lift their game.