Negtive report on ITC due to RCS Error

Good day I have been in contact with RCS customer service since last week to let them know that a incorrect reference number is reflecting on my ITC report and I did not apply for a loan, the lady confirmed it belongs to someone else and that her manager will send me an apology letter that states they will remove it from my ITC profile. I was promised that I would receive the letter within an half an hour, I'm still waiting for the letter. I have checked today again and the loan is still showing on my ITC report. After numerous phone calls to request to have this updated nothing has been done no reply on emails either. This is reflecting negative on my report because RCS never corrected this information to ITC and therefore I request to have this problem solved immediately please and remove the incorrect details from my name.