Very bad service and poor response from Transunion

I have been trying for 2 years now to have my details updated with no luck. I have logged disputes and keep on getting the same reply, they have 20 working days, the 20 working days have laps and no reply. My details was last updated in November 2018. This is affecting me greatly and my bank only looks at them. So can anybody from Transunion urgently get back to me as you are affecting my lively hood greatly!!!