misleading of contract

the problem started when i tried to load airtime and when i phone the customer service they blocked my phone on the saturday,i phone them the tuesday then they said somebody report my phone as stollen without any further info.i wanted to end my contract with autopage when they told me that i am due for a upgrade.i went into Greenstone branch and the guy ask me shy did i wanted to stop my contract i said because it is to expensive(R172) because i am unemployed.then we looked at some options and then i took out the contract for R89 a month.he explained to me that it will be more sms and more airtime and that was all. when my debit order went of this month it was for R309-00.when i phone the Greenstone branch the guy said he will fix this and they will refund me.i then decided to went to the branch again the manager said that the contract is different what they have told me. I was misled with this contract. Freddie does not work there anymore but in another branch.he phone me and the phone was cut off without any problem solved, he did not even bother tho try to phone me back again. how many time must i wast my money.petrol on them and this is there mistake.