Bul**** by Vodacom: subscriber collection

I was on prepaid from 2007 until I took a two-year contract with Vodacom in 2017. When the contract ended, Vodacom stopped the debit order and notified me. However, they continued to credit my account with airtime. When I received an SMS to say I was in arrears I immediately contacted Vodacom to tell them, my contract had ended and i did not understand why my I am being recharged. Now my family and friends are harassed with SMSes that claim legal action against me. I would like the following: A signed contract. Recordings of the call I made after I received the first sms claiming I was in arrears. In addition, all recordings pertaining to this matter. Most imprtantly i want the matter resolved