Vodacom con artists lies and false promises

Vodacom has left me in debt and with with no doubt it makes false promises. They claim to record all messages but conveniently cannot retrieve those messages when they are caught in a blatant lie! I asked 3 times on a call if I could cancel my extra data needed at the time as I went to teach online from home. Then when I called to cancel the extra data expense they said I'm in a new contract and cannot cancel for another 24 months. No one returns my calls on the My Vodacom app, another red elephant from Vodacom! My cellphone account has doubled in amount and I know I am a victim of Vodacom's con artist telesales and have been told lies and false promises. I am a teacher and have supported Vodacom for nearly 20 years. I cannot say anything positive about Vodacom or it's 'connectivity' on any level. I'm ready to move to another service provider.