Unprofessionalism and operating in bad faith of Trans union

I logged a call at Transunion after they made me write a letter to officially log a call, which I did. After sending a letter on 05 Oct '21,they said my dispute will be resolved after 20 working days. After 20 working days they did not resolve my problem and didn't respond about the progress of my dispute. I called to check the progress of my dispute on 05 Nov'21 and they claimed that they resolved my case on 15 Oct '21 but I have no proof of any correspondence from them to show they resolved my dispute. I was told to give them 48 hrs to fix the system error. I did but nothing happened from their side as always. I called again on 09 Nov' 21, I was told of the same excuse of a system errror. I was promised that the supervisor (Jeremy) will call me before he knocks off on 09 Nov'21, but I received no call from Transunion empty promise as always. I find this very unprofessional and very undermining. Their lack of commitment and dedication has made them to loose credibility from my side. It's actually an embarrassment to see this level of dishonesty from Trans union.