Vodacom ****ming me R1600 for a contract which i was told it was cancelled

I had a Vodacom sim card in 2022 if i am not mistaken the sim card contract expired after two year Ok i left it like that not knowing i needed to cancel the sim card. After months Vodacom called me to tell me about me owing by that time I even destroyed the sim card. I was owing about R1200 i do not know how i ended up to that amount for a sim card i do not use and i do not know what the number because it was for a rooter only. After that i decided no let me go to Vodacom shop and pay i did paid the full amount gentle men assisted me very nice we phone to cancel. I was told the contract was cancelled. After few months i am getting call telling me i am owing R1600 and i am handed over to MBD lawyer for the amount i am owing i do not know how. Sim card was destroyed long time ago i paid the the amount i was told i was owing and they phone and told me the contract was cancelled. Now tell me where is the R1600 come from because trust me i am not going to pay it. Vodacom is ****ming people just to get money from them. What type of a company does that. I will not let this slide trust me i do not care about their lawyers this has gone too far now. I am sick of this.