What went wrong? You mean what went right? Very little actually.
I sent a box of camping & cycling gear from Sydney to Calgary, Canada with DHL. It arrived without a hitch 4 days later.
As I was to continue the holiday in Europe, I sent the box to London with UPS. Big mistake. The cost was nearly double what DHL had charged for a twice the distance.
Two weeks later I still don't have it. The tracking page said it was 'Out for delivery', but when it didn't arrive I phoned them, only to be told UPS were applying a GBP £440 brokerage fee. Worth more than the contents.
The only department that can help can only be reached by email, which is ignored.
I am stuck in London, my holiday on hold while I try to extract my possessions from UPS's sclerotic bureaucracy.
How are they still in business?