Blacklisted for two (2) years by Makanda Finance YET my balance is zero!

The last time I borrowed and paid Makanda Finance in full was in January 2024. The amount paid for this last loan was even a little more than what I was supposed to pay, and they were owing me a refund which I gave up on after numerous phone calls with no luck. This company has listed me on credit bureau for old amounts from 2023 or previous years (which had all been paid). This has gravely affected my credit record, and I cannot buy anything on credit for the past two years and all my efforts in writing to them via email requesting assistance have fallen in deaf ears. I would really appreciate urgent assistance regarding same as emails sent to Experian and Transunion have not assisted thus far.