Incorrect details on credit profile

This is my second attempt contacting them regarding my credit report that has an error on it. Someone els account is linked to my credit report and I have send emails regarding them and till to day nothing was done. On the 4th of December I have send a email stating the problem, weeks later no one has contacted or even send me a response back, the only response I received was in 48hrs we will be contacting you.... I'm upset because on my latest report nothing has changed...