Outstanding account that I do not have

For the past 2 years I have received different calls from Vodacom, or a call centre that claimed my debit order did not go through or that I do not pay my account. <br> <br> I have the same mobile number for 16 years. I do not have an account with Vodacom. Yet after all the threats I did what they asked me to do. I did an afidavit with the police, I went to lawyers and asked for proof of the so called contract, the debit order (No Vodacom will give me a phone without a debit order). But with time and my affidavit they just get more personal information from me to use against me. I have done my part to proof I do not have an account with them. Last call I received asked me to do it again. Again? I have for example signed over my ID document with the date in order that it can not be changed with my affidavit signed by a commissioner of oath. Yet I am still harassed and threatened. How is this possible and how do companies get away with it? So you rather pay to prevent them to blacklist you? Hammond Pole legal firm was appointed to follow this up (my outstanding account) and even they have received my documents). I DO NOT HAVE A VODACOM ACCOUNT.