Incorrect Scoring No Calls Answered

My scoring dropped drastically in a space of a month. Compuscan scoring reasoning says I have accounts in arrears, Recently opened accounts in arrears, No record of property deeds and so forth. Mind you I do not own property, i have not been in arrears and currently do not have any accounts in arrears. I have been calling their landline for hours with no luck just goes quiet. Experian has all my data up to date and correct, why is Compuscan recording my data incorrectly when they fall under the same umbrella?!