This rating is because my son ordered medication 2 weeks ago and it still hasn't arrived. You use Royal Mail. His address is in Swansea. He expected the delivery on 23rd/24th December. Had email from Royal Mail on Christmas Eve to say that items had been wrongly sent to the Llanelli sorting office and would be re-routed. There was no further post because of the Xmas shutdown until today. He was told the delivery would be between 11.30am-1.30pm. Nothing had arrived by 4pm and the tracker says the items have been wrongly sent to the Neath sorting office. None of this is directly your fault unless there is a printing error on the address label. But maybe it is a mistake to use Royal Mail if they are so unreliable. I am hoping that you can find out what went wrong.