Debit order information

On 28 December I called into the Nedbank call centre. My asked the agent I spoke to regarding my debit orders and wanted to know if my MFC debit order already went of. The reason I asked is because I didn't want to spend the money I had before the debit order went through because I didn't want my account to be in arrears. The agent I spoke to then confirmed that the debit order went off therefore I used the money I had. To my surprise a lady from MFC called me on the 5th of January telling me that the debit order did not go through. This lady was so rude and had no customer service skills. She was blunt and disrespectful. I am in arrears with my account because of information they gave me, I would never have used the money if they told me the debit order didn't go through yet. This is their fault but now they acting like its my fault