PO Box, no post for three months

I only renewed my Post Box subscription in January and the local Bothasig branch confirm that the PO Box is paid for and current. However I have received no post whatsoever for about 3 months! This involves Bank statements, Rates accounts, Insurance policy information and now I have found that one of my vehicles has an expired Licence Disc and the penalty for me not receiving my documentation is about R80. I have visited the Bothasig Branch concerned and they are UNABLE to give me a reason for me not receiving my post and ensure me that previous strike action has been dealt with. I don't know which way to turn, I have paid money for a service I am not receiving and most of this post is from major financial institutions. It's another instance of a government department in total chaos, foreign investors must be leaving in their droves!