Incompetence

In 2008 I started paying off my credit card. It was paid up in 2009. This year I app**** for a home loan and it appeared that I owe on the credit card. I contacted standard bank they kept putting me through to the new attorney dealing with this. I got a hold of the attorney that was dealing with it where I had paid it up. The information standard bank gave me did not tie up with the attorney. According to standard bank I paid previously by debit order but the attorney says they didn't have debit order in place and they didn't have any records for me which meant it was paid and sent to standard bank. I couldn't deal with this stress as I needed my home loan approved due the fact that I'm renting on the property and if they sold to someone else I would have to move, so I paid it up again. Got the letter from the attorney and called standard bank, emailed the letter to them and was told to wait five days for them to send me a paid up letter. Now I receive an sms to supply them with information, so I call and get transfered to someone else who tells me they did not receive the letter and the person I spoke to will only be in Monday. Why did she log a query if there's no proof