Unfair ad inconsistent credit scoring assessment

I'm extremely frustrated with Experian unfair credit score practices and violation of NCA. Settled all my debts in April 2023 and have maintained a perfect payment history to date, despite this my score in May fluctuated three times and from June to date the score has been decrease while on TransUnion and Vericred it has been increasing. Additionally settled and closed accounts over 12 months are still appearing on my profile which still unfairly and negatively have an impact on my credit eligibility. This is in violation of NCA section 60, 61 ,62 and 72. I requested multiple times experian to investigate for the past three months fo any inaccuracies from their credit scoring assessment and still to date there is no response.