Contract cancelation not done .

Been with vodacom for over five years now had a internet contract with them called them in January they told me its ending in February only to find out its ending in January I was billed so high then I did an upgrade in February they told me it will take effect from 1st of March and I will have 14 days to cancel if I'm not happy canceled yesterday no they telling I was given the wrong information about the 14 days grace period by the agent now I have to pay and my contract is still not canceled told them my internet connection does not work they told me its because the Sim card is 4g and my router is 5g I mean they sold the product to me im the first place worst customer service in Johannesburg no one can help me Bunch of useless staff that does not know what the he'll is going on sp ****ed 😡😤