Parcel stuck at JIMC

I ordered a parcel from the UK, which was received at the Johannesburg International Mailing Center on 14 March 2015. It has now been 16 days and the parcel is still in the same location. <br> <br> I emailed the JIMC and the only response given was that I must give them time to work through their back log. <br> <br> Time is running out and I need this parcel urgently.<br> <br> My local tracking number is RI***ZA.<br> <br> I need urgent information on when and where I can collect my parcel. <br> <br> Regards, <br> <br> Benita