Paying what I didn't sign up for

I'm being ****med by vodacom and I would like to cancel my contract on black Friday I app**** for 100 gig + 100 night owl for R199 instead of debiting R199. Vodacom is changing me R401, they added the insurance which I didn't agree on when I call I don't get any help. Is better you fix your problems or cancel my contract and the package is top up sell phone no is ***. I was also not advised about the connection fees. December you debited I thought this month I will pay what I agreed upon but the prices increased