DHL appalling courier service!

I am utterly appalled at the service of DHL couriers. I sent a very important document that is highly urgent from Cape Town to Ithaca, Greece. I was told it would take 2-3 working days, payed the highest price I could and insured it on top. It’s 10 days later. The document has still not arrived at its destination. I tracked the document and it says it’s waiting for collection in Athens!!! When I phone to find out I am told, dhl don’t service that area! What?! So when I put the address on the document why wasn’t I told you don’t service that area? Why did no one contact me to tell me when it was in Athens that it won’t be going to it’s desinayion but just be waiting there for collection! That’s like sending something to George in South Africa and it arrives in Johannesburg and you must collect it from Jhb!! What kind of courier service is that? Needless to say now I have requested it to be moved to its final original destination and I have to wait up to two days before I get a phone call before they even send this!! This document was URGENT!! I am furious! Why does DHL not use a 3 rd party courier service in the local country. It should not be my responsibility as he client to be doing this for you! It should have arrived in Athens and when you see you don’t service he island it needs to go to, you should automatically get your third party courier service to take it the rest of the way!! All within the 2-3 working days that I was promised! This is NOT good enough! Will never be using dhl again if this is the service you offer!