Missing Registered Letters Sent Overseas

Below is a list of my registered letters sent overseas that have gone missing. All have been reported to the SAPO. No response.

Date Sent Destination Tracking No. 6 Nov 2017 Costa Rica RJ ********** 77ZA 27 Nov 2017 United Kingdom RJ ********** 51ZA 19 Feb 2018 United States RJ ********** 45ZA 14 Feb 2018 Italy RJ ********** 57ZA 16 Feb 2018 United States RJ ********** 91ZA 20 Feb 2018 Russia RJ ********** 47ZA 19 Feb 2018 Canada RJ ********** 05ZA 5 April 2018 United States RJ ********** 34ZA