Vodacom failing to cancel an upgrade and handing my name to their lawyers

Vodacom please can you clarify to me how does one end up being in a contract with you from 2010 till 2019. I fail to understand how can cancelling an updgrade lead to my name being handed over to your lwayers for unpaids. A simple cancellation off a contract from October has lead my name being registered to credit Buearue as non_payer. I get statements dating back 2012 which i did not request. Now I'm requesting a call recording from the day i made an upgrade of this number ********** 90. the updagrade was supposed to be 350, the debit orders are now 513.29 for services i did not recieve as 1. the device is with you. 2 the Sim card was converted to prepaid card. But as simple consumer I'm asking for call recordings off when i cantact your company for this number. A simply miss call from your constultant will not warrant the fact that you tried to call me and could not get hold off me. when you want to collect money from me you called me 15 times a day.. can i get the same calls to get my recordings. the Cancellation started Octber 2018 its january 2019 and i'm still struggling to get out off a contract with your company.