Appalling service

Called Vodacom call centre on 03 January 2022 to cancel contract ending 24 February 2022. Was told I have to call 30 days before contract comes to an end or I will pay a penalty. Called today, spoke to Vanesh who tells me I can't cancel or I will pay a penalty of R170. I have to call the day before the contract ends. This after he failed to sell me another contract. He tells me I was misled by the agent who took my call on the 03 January. Who is misleading who here? I'm very dissatisfied by this appalling service. They are quick to sell contracts. But after sales service is appalling.