SA Post Office rip-off

Never, but never, make the mistake of paying for your car licence online via the SA Post Office. On behalf of my daughter, I paid for a car licence, including delivery, on February 22. The reference number given was MVLT*** when I queried not receiving the licence. The quote number given was QNP17079 confirming that an amount of R460.00 had been paid to the Post Office on Feb 22. Online queries got me no further so on May 11 we went to the Walmer Post Office to find out what was happening. After a more than one hour wait, we were told the there was no trace of the application and payment on the system, so I had to shell out an additional R1, 042.20 for the by now very overdue licence, which takes the total amount paid to the Post Office almost R1,500. We were also given contact details of Shari Rogers ***) who handles online booking queries. Suffice to say three phones went unanswered. What do I have to do to at least get my R460.00 refunded?