Parcel stuck at Witspos Hub

My parcel RI ********** 31ZA has been sitting at Witspos Hub since 7 December 2017. Numerous calls to customer service and no one can give me an answer as to when, or even if, it will be sent to the post office. Sent 2 emails to customer service and never received a response. Sick and tired of dealing with people who have no interest in doing their job!!