Transunion - Not Applying NCR rules

I found a default on my credit profile with Transunion ITC, I disputed it and asked for evidence of the account, the process they followed to get the default as per NCA and I have still not received any satisfactory answer or email with the written proof. This is the 3rd time i have disputed the default listing and Transunion keeps on giving template responses. I also dont have airtime or incling to hold for their call centre. They keep sending me a generic response and a ITC report and promise to send more data. They dont have a direct email to query these issues.