Edgars/RCS not processing the credits they know about more than a year. Not replying to my emails

There is emails sent by me and there is phone calls about a couple of Credits that they know about and still more than a year have not processed. With that they should have fixed my credit report after they finally discovered that they did fiund my payment which is another case not rectified. When they phone you for their money they bombard you so that they can make money of you of emails and calls and letters but when corrections need to be made more than a year they ignore your queries.