Vodacom ********** upgrades

I was contacted by the consultant from vodacom advising me about the upgrade and I made it clear to him that I'm completely not happy with the service from vodacom and I'm not intending to renew or continue with vodacom and I didn't agree and discuss further about the upgrade. Now I received the sms notification of amount of R1545.46 due this month when I contact vodacom about the amount I was told I did upgrade on 23/10/2019. I requested the reversal of the upgrade cause no one made any sense or gave me any relevant answer about the upgrade. I came to realise this is the speciality of vodacom when I saw huge number of complaints on hello Peter about the same issue(********** upgrade). I requested the clip of me n the consultant they are running around like headless chickens and I was told they will do investigations within 3working days. Please some body stop this **********