Sainsbury's grocery deliveries are becoming increasingly delayed while the customer services and the drivers do not appear to have sufficient experience and training to deal with customer requirements. The communication between drivers and Sainsbury's customer services is equally inefficient resulting to misunderstandings. All in all very unprofessional, disappointing service. I had a delivery arranged between 18:30 and 19:30 this evening. An agent from Sainsbury's customer services called me around 18:15 to notify me that the driver was running late and they would be able to make the delivery around 20:00. I was not at home and given the update I was going to return later for the delivery. Around 19:00 the Sainsbury's driver called me to say that they were outside the flat waiting. He was shouting and he was rude. I tried to explain to him that Sainsbury's customers services had already updated me that the delivery was going to be late hence I was not at home. He would not stop shouting and in the end he hang up. A few minutes later I had another call from Sainsbury's office complaining that the driver had arrived but I was not there to collect the delivery. I tried to explain again that the reason for that was because his colleague had earlier informed me that the driver was going to be late. The agent could not trace in the system the earlier call and kept disregarding what I was saying. He promised to investigate and return back to me by 20:00. I did not receive any phone calls or my delivery by then so I decided to call Sainsbury's. An agent under the name Andy from the Glasgow office answered the phone but again he did not seem to be aware about the earlier update his colleague provided that there was a delay in the delivery. He kept ignoring me and practically insinuated that I was lying. He was rude and unhelpful while he refused to provide his full name to help me file a complaint. Similar mix ups in the delivery time have occurred in the past. There is never an apology or explanation while it is implied that it is the customer's fault. These incidents cause great inconvenience.