bad services from vodacom

I had a two year cell phone contracts with Vodacom which expired the first week in June 2020. On numerous occasions I have contacted the company to ask them to cancel my services. Every-time they told me it will stop end of June I told them I wanna go on prepaid Early in July they deducted again this time an amount of R135, Heaven knows for what as no airtime was loaded on my pH I really want no more dealings with Vodacom and I never gave them permission to deduct for prepaid as i want my number t be ported to pre-paid.