Very unhappy with IDM Holdings

I would like to know why IDM Holding is appearing on my credit report as something that is in arrears where as policies with them were cancelled in February 2024. I have received a paid up letter from them and also paid up my bebt with debt busters in full (clearance certificate received). But IDM holdings is still reflecting on my credit report and effecting my credit score. I have contacted them and they advised that it shouldn't be reflecting and that it would be a updated, 2 months later its still reflecting.