Mobile talk is nonsense

Good day, i got a a very intresting call from mobile talk yesterday. They offered me 5gb of telkom data for 80 rands per month which i found reasonable. They then said iam gonna pay 100 rand once off for admin fess. Sure thing. Then after confiming everything they sent me my invouce. It was absurd. Iam gonna pay 279 they included showmax and vivo insurance which i dont need which they intially said i cancel them at any given time no cancelation fees what. But now i feel iam being ****** daylight. I sent them an email cancelling all this nonsense they are busy sending me replies but havent delivered. Iam gonna go as far as closing down my bank account if i have to. I cant be paying that much for data. Never!