Unacceptable customer service and work ethic

I phoned to request banking details as well as reference number to use when making a manual payment via EFT. This lady then emailed me banking details as well as reference number to use. This amount was paid and never allocated to my account as Keyana Govender gave me the WRONG reference number (***) which is not my account! Now my payment is sitting on someone else's account since 28 April 2015. I have contacted her via email as I do not have her direct number and she now just ignores me. Knowing full well she made a mistake. All i need is for her to rectify it. I phoned customer care again, I sent them proof of payment and am still waiting and hoping for it to be allocated to my account. This person has caused me so much unnecessary stress, as she just does'nt care about assisting me but this is her fault!!! I am highly upset and have been upset for the last few weeks. I hope that she will be confronted about this and I do expect an apology. I have spent weeks calling and emailing and my problem has still not been resolved. This is really unacceptable. I get phone calls everyday to tell me that I have not paid, when in fact I have!!!! Please assist ASAP!