Query not getting resolved

Hi, as usual on the 18 of February 2015 i transferred R200 from my cheque account to my nedbank pre-paid card. I then went to the ATM to withdraw that money but the machine told me withdrawal cannot be completed.I then tried other ATM on the same evening and same message.The following day i then went to Rosebank branch to find out what has happened and I was told the system indicated that i had withdrawn and the SASWitch query was logged and then told I should come back in 7 working days.I then went went after 7 days and the consultant told me there is still no response. He then logged another query and told me to come after 7 days again.I then went again after 7 days and I was told the consultant is on leave and the manager asked to come back again when the consultant is back from leave.After maybe a month to 2 months, i got the consultant and told me there still no response.This time I was told to again find out the incident date so that they can log another query.What do i do now to eventually find out what happened to my money? disapointed what service