TransUnion Intermediate Holdings, Inc. Credit Reporting Complaint

TransUnion Intermediate Holdings, Inc. Credit reporting department,

Credit reporting company's investigation Inadequate help over the phone Wisconsin

I called their dispute department and requested they remove all the hard inquires from my credit reports. I have sent letters to each one of these companies and have not received validation from any of the companies. I explained this to the representative that answered and the supervisor I spoke with. I was told that the only way to remove these inquires was to get a letter from the company that did the pull saying they did it and should not have. I told them I contacted each and every one of the companies and they did not respond with in 45 days of the letters being mailed. How am I supposed to have them sign a paper if they are not responding?