MTN THEFT

I'm sick and tired of MTN as it has been *****ing from my bank account since January 2021. I never had any contract or deal with MTN my entire life but they are busy debiting these crazy amounts from my bank account every month even after I lodged a complaint with them for almost 2 months now . I'm told there are 2 cell phone contracts taken in my name but they are taking forever to investigate while I continue paying bank charges and penalties for unpaid and returned debits