No Service, People failed to do their job

How does this company just issue out loans without doing a thorough credit check. They issued out a loan to someone who is not me and when I approached Old Mutual to inform them about this issue after I found out from Transunion, I called them and I was redirected to the ***** department where I dealt with a Natasha Moses, Glenn Van Eck and a Nadine Joubert who requested that I get an affidavit done and send it through. I did as they asked and this dates back to the 24th of May 2018. They've been ignoring my calls and emails and this has been going on for a almost year now. I have all the emails where I am the one communicating with Old Mutual trying to get this issue sorted. I have been extremely inconvenienced where my credit record has been affected and have blocked opportunities for me.