@Del37 Thanks for posting. You will need to log a dispute by contacting Equifax on 0800 014 2955. Calls are free from a BT landline, charges from other networks and mobiles may vary.
Or, you can visit www.equifax.co.uk/ask for help.
You can also write to them at:
Customer Service Centre
PO Box 10036
If there's an error Equifax will contact our acquisitions team and have the default investigated. Usually it takes up to 21 days to review each case and the account will show as in query on the Equifax credit report until the issue is resolved.