Still being punished after 7 years

I sequestrated in 2016 and was rehabilitated in 2021. I received closure letters from all of my accounts from FNB and has since not incurred any debt with FNB. I am now in the position where I want to buy a car, so I wanted to get a pre-approval to see for how much I can buy only for Wesbank to tell me that a current Firstrand account is in arrears and they cannot approve an application until this has been resolved. How is it possible after a sequestration + a rehabilitation + closure letters after 7 years this is still an issue. FNB is the ONLY bank I have issues with regarding outstanding debt of which there is none.