Disgusting

Nimble "wrongly" handed my account over to TransUnion, I've sent all the correspondence to TransUnion and no feedback. I disputed this and was told to email my ID and proof of address, which I did. I then received a SMS that my dispute was closed due to documents not received??? My account - which I was handed over for (ERROR - according to NIMBLE) - I paid in FULL two years ago!! I emailed my documents again, response on that email "we no longer use this email address" . My credit score is ruined due to an error, now I must struggle to sort this out and NOBODY of one of these companies are willing to help??? How can you do this to people?