cell c *****ing my money

for months now cell c has been debiting my account yet i am not a cell c client. at first i went to my bank they advised that they cant block them as they can easily change the reference number they use the following month to access the funds and i needed to contact them directly which i did. i called the 084 140 number and their agent confirmed this when she couldnt find an account with my details, they then requested i email them my bank statements as proof as they couldnt take my word for it, which i do reluctantly so! it just doesnt make sense why i should have to give the people *****ing from me my bank statements which contain vital personal banking info. anyway, since i want this resolved fast, i send the statements to [Email Removed] a few hours later i call to follow up and spend 17mins on the phone waiting to be transferred to a supervisor - which i had requested the moment they answered, i am then told it takes 48hrs for emails to come through to them? i have no idea what kind of email service cell c has that takes 48hrs to deliver an email and why its so difficult to speak to a supervisor yet *****ing from innocent people is so easy. this is totally unacceptable