7 working day and no parcel AGAIN

Our supplier uses DHL to send goods from Sweden, I can count 7 times the parcel has been delivered to our old address over the last 4 years. When I attempt to rectify this it takes nearly two weeks for any action to be made by the DHL team. This process involves calling the call centre three times a day every day and dealing with a team of people and system which never generates a consistent response or answer. Now I am sitting with a parcel that is nearly two weeks late since being released from customs. It is clear the address was never corrected on your system despite calls from myself and a third party shipper who is trying to assist me in claiming my parcel. DHL need to train their call centre staff and sort out the gap between their warehouse and call centre. Even the managers tell you one thing and they come across as not knowing what has happened to my parcel. This happening the first week of June as well with our previous parcel. My clients have cancelled their orders for two consecutive shipments due to the fact that it takes two weeks of empty promises of a local delivery via DHL. I cannot believe a multi national organization repeatedly offers bad service such as this.