Vodacom is ***!!

I took a contract with contract I app**** online an took a contract phone with them the lady explained to me that I will be paying 200 every month okay I agreed the first month obviously it's the pro rata an stuff no problem now when my bill was emailed to me I see 3000rand how ? Now I am shocked I call them I am told that I have an open line which is unlimited airtime basically how unfair is that where must I get that 3k? The consultant told me that unfortunately they cannot help me with the matter they cannot clear the amount what really upsets me the most is that vodacom even handed over my name because of someone that doesn't explain to customers an rush to get sales . No one is willing to help me with this matter I haven't been paying because where the he'll must I get it from ?😒it's *** I hate Vodacom honestly!!!