Shochick expirience with WFS and Headoffice

Woolworths Financial Services just left me at a jaw drop with their service. I paid my debt through nimble which Woolies sold my account to. I was advised that Woolies wrote off the account in 2019 after I made 2 years of payments. Now that i try track this, the head office level does not know how to help me because they say they sold the account to more than 2 companies and its hard to track. WFS does not answer emails, takes calls and lets you wait for more than 30 minutes, still you get redirected to somebody who cannot help. I cannot believe that this is associated with Woolworths really.