Vodacom ****mers

I have a huge problem with Vodacom, i requested an early cancellation and paid the amount now i have to pay for February, even worse is that the amount is higher then my usual monthly fee.. please fix this mess because i don’t have such money lying around. I was assisted in submitting my cancellation at Vodacom crossing. On the line i was told i won’t make any payments afterwards but now they tell me i have to pay an amount which is higher mxm i’m so ****ed!! Where will i get that money? For what even , this is insane