Nedbank Money Grabbing

I opened a new bank account at Nedbank in December 2018 when I lost my job and joined a debt review company to handle my accounts responsibly. I was also expecting my uif monies to be deposited into this account. While at labor department yesterday they advised me that the funds were deposited into my account on the 24th of January. I then rushed to the bank to verify this as I had not received any Incontact message and yet I had given all the correct details. On arrival at the bank I went to an atm and checked my balance. The amount on the deposit slip shows an amount of R4924. 99. This shocked me as I've been waiting months for the fund to pay out and they said it would be an amount of R14 539.52 due to the delay of payouts. I then got a 1 month statement to see what was going on. Shocked to see that an amount of R8737. 51 had been debited from my account. More shocked as I had never given these details to anyone yet except the fund. I went into the bank. They said they were unable to assist me but I could use a self service telepho e in the bank. I was transferred from one department to another with no assistance. They did manage to tell me that the nedbank legal department is responsible for the debit and I should contact them. This was for a outstanding personal loan from 2007. I have been managing my credit responsibly for years now and to my knowledge that particular debt was prescribed. I last had it listed for payment with lifeline debt solutions in 2008 and that was the last time I heard anything with regards to that debt. I've had new accounts since then with no problems. When I now became unemployed and registered for debt review there was no trace of this outstanding debt on my XDS report. I am still unable to get through to nedbank legal to resolve this. This is money grabbing and it is *******. I need my money back...