Experian is difficult

I have been trying unsuccesfully for months to get Experian to remove old negative accounts. These accounts are paid and soon to fall off, however, they continue to ignore my requests. I have written several letters and in the last even threatened to sue. I have sent a complaint to the FTC and to date have not heard anything. The frustration wears on! They are the most difficult credit union to reason with. I won't give up, the credit bureaus want to discourage you with the hopes you'll say forget it. If I have to write a letter every month for the next year, I will. My credit is everything and I will keep on keeping on!