Good morning Please i need help

Good morning Please i need help. I have opened a ***** case from mtn .even now im still waiting for answers. There's someone who opened account from mtn for 3phones under my name .because i will end up blacklisted for something that I don't know. I can not pay for the phones that's i don't have. Please i need help. Because every time I'm calling MTN help line there's no one assisting me.