Vodacom sa

I had a with wi-fi contact Vodacom for 24 months for 150gig for R742per month some months they have ****** me from my data on which I had filed a complaint. In the 24 month i have never ever skipped one payment or made a late payment on my account which I have prove off. So on 13 March2021 I have wrote an email to Vodacom to cancel my contact which they never have rep**** on then they phone me jus before my contract is over to offer me another one for R200 and something and I declined it as I said I rather use Telkom or Rain which is cheaper and uncapped. So till 3 May2021 Vodacom continue to deduct money from my account without my permission as my contract had expired on the end of March no they have blacklisted me as a bad payer and non payer for not paying my account till October 2021 as I have proof that I am using Rain and Telkom. So now I have to clear my name on my credit score which shows I am a default payer so my question is canI sue Vodacom for this and with paying all the lawyers cost.