R5000 payment not reflecting and still not fixed for over a month

I went into Woolworths in Gateway and made a payment of R5000 to my credit card.After a few days ,I noticed it wasn't reflecting on my account.I had then went in store and call the call centre.They advised me to provide them with a proof of purchase,I had lost my original receipt though.I provided the call centre with exact time,date and till I paid at as well my card details which I paid with.i also went to the back and submitted a bank statement,which wasn't good enough for them either.After emails being sent back and forth and me being treated like a ********,I went back in store because I was furious that the call centre made it seem that I have not paid this amount, I spoke to one of the managers on duty. Thus manager was kind enough to provide me with an electronic journal of their system,which shows the exact details of my payment which I submitted to their head office.i found it amusing that me as a customer managed to get this document easier than the financial services department themselves.Today is the 4th day of January and I am not amused anymore.This amount is still not reflecting in my amount.when I email the queries department ,they keep sending me a copy paste response,that the matter is still being investigated. I called the call centre many times,after holding for 15 minutes,I get the call dropped on me or speak to agent who promise to call me back but never do. What more do you need to investigate when I have provided you with proof?And to top it all off,they have sent me a statement and debited the installment for the R5000 which i paid when in actual fact my account should be zero.Can someone please assist me in taking this matter further as I am not getting any resolution from Woolworths financial services . I am at my wits end