A victim of being bul**** by MTN

A *****ulent account was opened in my name in 2020 Mtn requested affidavits and supporting documents and they acknowledged it. Last year they handed me to collection agency claiming I'm owing over 30k and my credit profile compromised. I have called MTN many times they send me from.1 post to another . Nible Solutions calls me everyday threatening me to pay up. I never had a contract with Mtn