I have received a number of letters of reminder from a debt collection company saying that I have to pay the debt for a mobile phone. After the first letter, I paid the debt directly to the operator and I think that the debt no longer exists. However, the debt collection company continues to insist that I did not fully pay off the debt and threatens to place personal data about me in the debtors database. Do I have the right to know what information about me is entered into the debt collection database, and what should I do if this information is not true?