DHL service is disgusting

After waiting almost a week for our package to be picked up, Our documents are still not delivered after two weeks, i paid for express delivery. 1st it was sent to wrong destination after arriving and clearing customs in Heathrow, then to the correct service area. Delivery was supposed to be on thursday, i have phoned and was told delivery would be on friday morning. It was not delivered and the person that was supposed to receive the docs was told that he cannot pick it up because it's already in the "hub" now i see that the package was sent back to london Heathrow. The receiver was told that the sender should lodge a complaint. I have emailed, phoned, complained, but I'm getting nowhere with DHL!! The person who responded on my previous complaint is not even responding on my emails anymore.