Moving me backwards

<p>Standard bank made a mistake and falsely accused me of not paying on an account that I had infact closed and they failed to that on their side. I only realised this when I was denied a contract from a mobile service provider which was very cheap, upon investigation and harrasing messages from Standard Bank I could only conclude that because of this bank's error I have infact been listed as a slow payer when infact it was their mistake. I would like to know how this can be rectified because my life is passing me by and I think its only fair that Standard Bank goes an extra mile and works tirelessly to remove this misleading information on my profile.</p>