Experian dont update Consumer info on time

Me and my Partner always miss opportunity to buy property because my partner paid Avon/Justine is not removed as earrears on Experian credit profile.Despite many disputes we done with Experian my Partner is still blacklisted after one full year of paying his Avon Account.We are fed up with Experian and when call they dont answer.When we check the status of my partners status with other three major credit Bereaus the Avon account is updated it's only Experian that doesnt want to update.We wish we had Lawyers,we were gonna sue Experian.