Dispute not resolved but query closed

I've been disputing an issue with Experian for two months, but my requests keep getting closed without any resolution. My payment history profile is severely outdated, showing accounts that are over 10 years old. This delay is really frustrating me because of their poor service and lack of response. When they close the query, they don't send any communication, case number, or reference number at all. They keep asking me to log again but same feedback.