Rip-off

Firstly I made a direct deposit of R30 which were successful. I did another deposit of R20 and that was also successful however my last deposit of R50 did not reflect. I called the customer care number however they only told me just to send an email. Until today I still have not received response. I then did another deposit of R5 and that reflected so where are the problem. The money is out of my account but not reflecting.