***** due to lost identity book

I was trying to buy a car from nissan when I was busy with finance to be approved they told me that I owe Markham money so I visited Markham today to find out about that account and to knw how much I owe due to dis ********** activity so the lady from Markham thabong called customer care of tfg group shop to knw what happened so the customer care gave us new number to speak to the department responsible for those kind of account the person she talked from that department didnt give us his or her name because I wanted to knw how can I fix this because I have not opened an account at Markham I try to apply but it was decline not knowing the reason so now my life is stuck I cant even do anything or evn apply for a loan due to this so please I would like to fix this matter as soon as possible my life is hanging by a thread so please I need ur help because I no longer have both parents and my family is depending on me so please ur help would highly be apreciated.