failing to allocate payment which was paid via EFT

I Made the payment of R600.00 on the 05/09/2014 via Internet banking for the Woolworth Store card and i have been sending the proof of payment to them but still they still failing to allocate this payment. Am phoning their call centre now and then and every on comes with a new story and sending me the emails to say is updated when i check the statement i found the is not updated.