Unfair credit report

I am not happy how Compuscan do the credit scoring and it is so unfair and it doesn’t ever change, because with Experian my credit scoring it is rated AVERAGE but with Compuscan it is rated BELLOW AVENGE. From what I know these two companies work in hand to hand. Worse of everything I haven’t been behind with any payment since last year despite the dispute I have Logged three months ago which was sorted and was hoping that Compuscan will change my credit scoring like how Experian did. I am beginning you please be fair and change my Compuscan credit scoring to be the same as Experian which is Average at least. I have sent emails, made calls which was unsuccessful:(