MTN CONTRACT THAT I DO NOT KNOW OF

I have been receiving calls for the past few months from MTN telling me that I do owe them money for the cellphone contract that I do not even know of, I had never acquired any mobile contract from MTN in my entire life so this one came as a surprise.

I submitted a copy of my id and affidavit at the nearest MTN outlet hoping to get a solution but I am still getting calls and messages even today.

account ref provided on the message is: ***