Pack and Track International deemed "insufficient tracking"

I sent a package Pack and Track International on 13 Dec. It has not arrived in Germany as yet and the buyer opened a case with ebay. I lodged an enquiry with Australia Post and it is still being investigated. ebay has now closed the case in the buyers favour saying that there was "insufficient tracking".

 

I think Australia Post should be allowed to complete their investigations before a case is closed.

 

If Pack and Track is deemed to be "insufficient tracking" then it is not worth using.