Telkom must give correct information to their customers

Good day I'm here to report Telkom with the service that they gave me, giving wrong information, they send me SMS saying my contract is due for upgrade on the 15 of November 2024, telling me that if I upgrade I will only pay the new upgrade and old contract falls away, I did upgrade on the 06 of December 2024 I took iPhone 13, The January 2025 invoice show that I must pay both contracts old and new, at the billing section telling me I have to pay until the last day of my contract ends, At the store saying I will only pay for a new contract because it's an upgrade. I'm not happy with the service Case number is ***0, I spoke with Mpilo Mdluli

My details Alinah Msimeki ***/ ***