Two parcels sent to two different countries: Absolutely shocking service 
I sent one 14KG parcel and one 20KG from UK to South Africa (filled with personal items as I was moving country). Both parcels were sent to two incorrect countries. Even though a person who received the one parcel contacted me, it has been a month of back and forth and convincing them to retrieve the parcel for me. For the other parcel, I had no luck. The leader of the customer service department doesn't even know how to read its own tracking page. They are absolutely useless. 