unfair blocking by Wesbank

2017 I got finance for a brand-new ranger over. however I was sold a defective car by the dealer and I took back the car to the dealer within 48 hrs. I notified Wesbank about the issue and they froze my Wesbank account. 6 months down the line, the dealer settled the car and closed the account. This week I app**** for finance via another dealer and I was told Wesbank has blocked me. I asked why and they told me that its because Wesbank has a file that says u defaulted payment for 6 months which is not true. I never defaulted payment, instead my account was frozen and Wesbank was not running debit orders coz I donthave the car. Now Wesbank is refusing to finance me due to that and I think its not fair