Capfin trying to ruin my credit report with a loan i never took

I just called capfin because I wanted them to update my numbers I was using to log in while I was trying to apply for a loan .I never had any loan with capfin I was just trying to apply .but then I was told I was handed over to DMC for a loan I took 2013 .I didn't take any loan with capfin and I was not even qualifying for a loan at that time .now they ruining my credit score. I really need to escalate this matter , I cannot be handed over for something I never had .what a ****